Breath-Link Series
Lightweight and High-Performance for Welding Operations

BL-7005

Starting April 2022, for indoor metal welding operations, the use of high-efficiency protective masks appropriate for the measured welding fume concentration will be required. Higher welding fume concentrations will necessitate masks with a higher assigned protection factor.
The BL-7005 is a high-end model suitable for welding operations requiring a protection factor up to 33.

Sakai Model
BL-7005
Includes battery and charger

Lightest PL2 model in the domestic market *Note 1
Assigned Protection Factor: 33
Extended filter life *Note 2

*Note 1: Among domestic PAPR (PL2 Model) products, released in June 2021 (based on company research).
*Note 2: Compared to the BL-1005-02 model.

Sakai Model
BL-7005AL
Includes battery and charger
Radiant heat reduction
Constructed with aluminum vapor deposition

A high-end model has been added to the 1005 series, which is highly popular in the welding industry.

Because it is an upgraded model based on the long-selling 1005 series, users transitioning to a powered air-purifying respirator can do so with confidence. (Sakai Model BL-7005)

Sakai Model BL-7005
The long-selling 1005 series known for ‘ease of use’ has now evolved with higher ‘performance’ and lighter weight.

5 Benefits of Breath-Link

Based on Breath Synchronized Blower System (BSFS) technology, it delivers air during inhalation and stops blowing during exhalation. This reduces fan noise, provides safety and comfort, and lowers operating costs.

1. Lightest PL2 model in the domestic market (approx. 290g)
   With high fan efficiency reducing battery size requirements, the use of a compact battery combined with the facepiece results in a lightweight product that is easy to wear for long periods without feeling heavy.
2. Extended filter life via new fiber structure
   Compared to conventional filters, the new filter provides high collection efficiency (PL2) while allowing for longer continuous usage.
3. Long battery life
   Reduced fan noise operation helps minimize battery consumption.
4. Natural breathing
   Improves breathing dynamics during various tasks and reduces the discomfort of wearing a mask. It provides a natural breathing sensation as if not wearing a mask at least.
5. High safety
   With a positive pressure design, it minimizes the ingress of dust and moisture into the facepiece, thereby increasing protective efficiency.

Other Features

• Use with welding mask: Can be used together with a welding mask and is compatible with welding surfaces.
• Voice: Allows voice transmission inside the mask and enables communication with others.
• Fit check: Enables quick checking of the mask’s seal using the integrated fit-testing kit.
• Notification: Notifies the battery replacement time through an “airflow conditioning” indicator.
• Silicone: Made of durable silicone with high heat resistance, providing comfortable wear.
• Auto on/off: The fan automatically starts when wearing the mask and breathing in, and automatically stops when the mask is removed.

Performance and Specifications

※1: The duration positive internal pressure is maintained under standard national respiratory conditions during normal room operations.
※2: The duration positive internal pressure is maintained in a dusty environment, utilizing respiratory data from actual workers.

Information on Welding Masks

• New fume countermeasures based on specific revised regulations.
• How to select a new mask based on specific revised regulations.
• Recommended masks for each required protection factor, etc.

Note: Protective regulations to prevent health hazards caused by specific chemical substances.

• Product colors may slightly differ from actual colors due to printing or photography lighting.
• Product specifications and designs are subject to change without prior notice for continuous improvement.

Sakai Model BL-1005-02

Powered Air-Purifying Respirator (PAPR)
Breath-Link Series

Lightweight Design
Approx. 270g

Benefits of “Breath-Link” during inhalation

1. Easy Breathing
2. Extended Work Duration

Sakai Model BL-1005-02
Includes Battery and Charger
National Assay Certificate: No. TP1

From arc welding to tin plating countermeasures

Sakai Model BL-1005-02
Following the best-selling 1005 protective mask model, this is a Powered Air-Purifying Respirator (PAPR).

What is the Breath-Link Ventilation System?

The Breath-Link series is equipped with a ventilation function synchronized with the user’s breathing rhythm, known as BSFS. BSFS implements “silent blowing” during inhalation, which not only enhances protection but also minimizes breathing resistance and conserves power consumption.

1. Benefits of Breath-Link

1. Easy Breathing
   Minimizes breathing discomfort by adjusting the airflow in synchronization with the user’s respiratory rhythm.
2. Extended Work Duration
   By restricting unnecessary noisy fan operation, the device consumes less power, allowing for longer continuous working hours.
3. Lightweight at approx. 270g
   Due to low power consumption, a smaller battery can be used, reducing the total mask weight to approximately 270g for easy mobility.

2. Battery Drop Prevention
The mask features a “release lever” inside the battery compartment to secure the battery and prevent it from falling out.

3. Charger Replacement Parts
Replacement components include the battery charger, filter cover, and other accessories, ensuring convenient maintenance when needed.

Battery Charger: For BL-1005-02	Filter Cover: For BL-1005-02	Exhalation Valve: Model T-8K

Features

• Fit Checker
  Allows for quick and easy seal checks thanks to the integrated fit checker mechanism.
• Adjustability
  Mask size and fit can be easily adjusted with the provided adjustable harness options.
• High Airflow & Anti-Corrosion
  Utilizes electrostatic filters to reduce operational noise while ensuring high performance.
• High Elasticity and Durability
  Employs SB/SA type harnesses known for superior elasticity and long-lasting durability.
• Silicone Material
  Made with highly durable and heat-resistant silicone for the facepiece.
• Lightweight and Ergonomic
  Lightweight design makes it easy to carry and perfectly suited for active work environments.
• Auto ON/OFF
  The fan automatically starts when the mask is donned and inhalation begins, and stops automatically when removed.
• Alert System
  Provides notifications for battery replacement via the “Airflow Regulation” fan alert.
• Compatible with Welding Shields+

Performance and Specifications

Note 1:
The duration positive internal pressure is maintained under standard national respiratory conditions during normal room operations.
Note 2:
The duration positive internal pressure is maintained in a dusty environment, utilizing respiratory data from actual workers.
Note 3:
Depending on usage conditions, the duration of positive internal pressure may be shorter than stated.
Note 4:
Applicable for welding operations where the required protection factor is below 14.

Disclaimer:

• Product colors may slightly vary from actual colors due to printing and photographic conditions.
• Test results are for reference only. Actual operating times may vary based on the specific work environment.
• Product specifications and designs are subject to change without prior notice for continuous improvement.

Lightweight performance in a cordless design

Sakai Model BL-321 Series

A Powered Air-Purifying Respirator (PAPR) that minimizes leakage risks, ensuring safety while reducing the physical burden on the user through a lightweight facepiece design integrated with a motor and battery.
The BL-321 series utilizes “Breath-Link” technology to synchronize airflow with the user’s breathing rhythm, reducing fatigue and conserving battery power during use. This is a lightweight, cordless series featuring a compact battery, delivering both comfort and safety.

Lightest weight in the domestic market※
Enhanced water resistance
Replaceable filters (PL1/PL3 classifications)

※The BL-321S is a Japanese domestic PAPR product, released in May 2018 (according to company research).

Sakai Model BL-321S-02
Powered Air-Purifying Respirator
Uses BLA-62 Filter
Particle Collection Efficiency: 95.0% or higher (PL1)

Sakai Model BL-321H-02
Powered Air-Purifying Respirator
Uses BRD-82 Filter
Particle Collection Efficiency: 99.97% or higher (PL3)

One device suited for multiple operations!
Metal grinding and general dust	Welding operations	Tunnel construction	Asbestos removal	Indium handling operations
			(BL-321H model only)	(BL-321H model only)

Easier to use with Breath-Link Technology

Breath-Link technology, featuring a unique blower structure (BSFS), implements “silent blowing” during inhalation and stops blowing during exhalation, minimizing fatigue when wearing the respirator. By utilizing a cordless electric fan, this product reduces power consumption while achieving a significantly lighter weight compared to conventional devices.

• Lightweight
  Improved fan efficiency reduces battery power consumption, allowing for a smaller battery and greater mobility.
• Easy Breathing
  Synchronized airflow matches your breathing rhythm, reducing the discomfort often associated with wearing masks.
• Reduced Operating Costs
  Precise control of fan rotation speed conserves energy and lowers long-term operating costs.

Airflow Warning System for Safe Operation

To maintain the safety of a Powered Air-Purifying Respirator, it is crucial to sustain adequate airflow and keep the internal facepiece pressure positive.
The BL-321 notifies the user via an “airflow alert” if the internal pressure drops due to filter clogging or battery depletion, which causes a reduction in airflow.

The system maintains stable internal pressure until a filter replacement is required.

• Filter clogs → Airflow decreases → Internal pressure drops → Constant airflow warning triggered
• Battery consumption notification → Low battery alert triggered

Rhythmic airflow helps regulate pressure and minimizes energy consumption.

Performance and Specifications

※1 The duration positive pressure is maintained inside the mask under high airflow breathing conditions in a standard room (National Assay Standard).
※2 The duration positive pressure is maintained inside the mask in a dusty environment, based on actual worker breathing data during operations.
※3 May be shorter depending on usage conditions.

Water-Resistant Design Prevents Ingress ※1

Further improved water resistance necessary for actual field work, achieving an IP55 dust and water resistance rating ※2. Designed to protect against dust and water jets. Can be used during sudden rain or in operations involving water splashing.

Notes:

• ※1: Water resistance is not guaranteed in all usage situations.
• ※2: Complies with JIS C0920 standard for degrees of protection provided by enclosures (IP Code).

Maintenance

Adhered dust can be cleaned off with running water.
For stubborn dirt that cannot be wiped away, the unit can be cleaned by washing it with water. ※

Notes:

• ※: Be sure to use the maintenance plug (sold separately) during washing.
• ※: Do not submerge the unit in a bucket or spray water into the inside of the mask.
• ※: The battery and filters cannot be washed with water.

Battery Drop Prevention

The battery is secured by a “Release Lever” inside the battery case to prevent it from falling out.

Other Features:

• Failsafe Protection
  Even if the battery is removed or depleted, the mask maintains particulate protection equivalent to a standard non-powered dust respirator.
• Auto ON/OFF Function
  The fan automatically starts when the mask is donned and the user inhales, and it automatically stops when the mask is removed.
• Silicone Material
  Utilizes silicone material for a comfortable and durable skin seal.
• SBW/SAW Type Harness
  Uses SBW/SAW type harnesses for high durability and stress resistance.
• Speaking Diaphragm
  Equipped with a built-in voice transmitter to allow communication and instructions while wearing the mask.

Disclaimer:

• The color of the product may differ from the actual color due to printing or photography lighting.
• Product specifications and designs are subject to change without prior notice for improvement purposes.

Usable for a wide variety of tasks!

Replaceable Dust Respirator
Sakai Model BL-1180H

The BL-1180H is the highest-performing dust respirator in our protective mask lineup, featuring an RL3 classification (particle collection efficiency over 99.9%).

This mask can be used for both indoor and outdoor construction site operations. Featuring replaceable filters, it fits the profile of a half-face dust mask. Additionally, the filter can be swapped with a chemical cartridge for use as a gas mask in toxic environments.

National Model Assay Certificate No. TM788	Alpha Ring Filter Model RD-8

RL3
Primary Applications

• Asbestos removal operations (Level 1 tasks) ※1
• Indium compound manufacturing and handling operations
• Dioxin handling operations
• Welding operations
• Grinding operations

Note: Usage may be restricted depending on conditions such as workplace concentration levels.
For details, please refer to the “Examples of Applicable Work” below.

Examples of Applicable Work
Dust types and work descriptions

• Work with risk of Dioxin exposure:
  Level 1 tasks utilizing asbestos removal masks classified under “Category 3” or “Category 4” for asbestos abatement.
• Indium compound manufacturing and handling:
  Tasks where indium compound concentrations are below 3 µg/m³.
• Metal-related operations:
  Tasks generating metal fumes (including welding fumes) in areas where metal fumes are present.
• Work generating dust from substances with concentrations below 0.1 mg/m³:
  Tasks in areas where dust is generated from substances at concentrations lower than 0.1 mg/m³.

※1: When removing Level 1 plasterboards using cutting methods, powered air-purifying respirators (PAPR) must be used.
※2: Welding operations requiring a protection factor below 10.

Replace Filter with a Chemical Cartridge for Gas Mask Usage

Painting, washing, and degreasing operations, as well as solvent handling tasks.

By exchanging the filter for an absorbent cartridge, it can be used as a G-7 Gas Mask.
National Model Assay Certificate No. TN382.

When KGC-10C Cartridge is attached	KGC-10C-03 Organic Vapor Cartridge Select the appropriate cartridge based on the specific gases and vapors in the environment. See the back page for “Compatible Cartridge Types”.

Respirator Features

For the 1180H model equipped with the Fit Checker, simply pull the lever to perform an immediate Fit Check.
Pull up the Fit Checker and instantly test for leaks!

Even with a high-efficiency filter, wearing the mask incorrectly negates its protective value. With the integrated Fit Checker model, a simple lever operation is all it takes to perform a user seal check, making fit verification fast and easy.

Facepiece contact area designed for optimal fit

Skin-friendly silicone material
The silicone facepiece reduces skin irritation and is less likely to cause dryness. This material remains highly flexible, accommodating facial movements to provide a stable and comfortable fit.

Freeposition Underchin
A specialized design providing an optimal facial contact shape.
By adjusting the nose section first and then securing the chin area, the mask accommodates varying face sizes, preventing leaks in vulnerable areas such as the bridge of the nose.

Respirator Performance Specifications

The figures above indicate the performance when using the standard product (Size M mask, RB type harness) without any accessories/options attached.
Masks are available in two sizes: Size M (Standard) and Size S.

Compatible Filters

The 1180H model can be used as the 1180-05 model dust respirator by replacing the filter with the LAS-51 Alpha Ring Filter. Please check the instruction manual for applicable operations.

Compatible Chemical Cartridges (Sold Separately)

※1 Attached to the chemical cartridge for use against dust mixed in toxic gases or vapors.
※2 Represents a testing standard equivalent to “Class S1” of the national assay regulations.
※3 The Assigned Protection Factor against dust, etc., is “4”.

If you prioritize fit capability:

Hi-Luck Series by Sakai
The Hi-Luck series is designed with a three-dimensional FF Lip (Free Fit Lip) structure that enhances fitting capabilities.
Masks equipped with the FF Lip provide high airtightness and easily adapt to facial movements, delivering a natural, secure fit.

• Excellent skin contact feel and superior moisture absorption.
• Easy to don and reduces skin irritation due to the use of urethane rubber material.
• Fit can be adjusted while wearing the mask.
• Convenient folding function for easy carrying (excluding Hi-Luck 550/555 models).
• Prevents internal condensation and features an anti-fog filter design.

To protect the environment, no metal components are used, ensuring safe disposal via incineration.

Hi-Luck Series

Product Name / Image			Hi-Luck 350 DS2 N95 Hi-Luck 350T DS2	Hi-Luck 355 DS2 Hi-Luck 355T DS2	Hi-Luck 650 DS2 Hi-Luck 650T DS2	Hi-Luck 550 DS1
			Assigned Protection Factor: 10	Assigned Protection Factor: 10	Assigned Protection Factor: 10	Deodorizing Type Assigned Protection Factor: 4
Features / Certification Code			National Certification No. TM339 / TM609 ※Image shows Hi-Luck 350	With Exhalation Valve National Certification No. TM340 / TM628	Uses Bipro-Micron Filter (Also available as 655/655T with valve) National Certification No. TM597	Removes trace organic odors simultaneously with dust (Also available as 555 with valve) National Certification No. TM383
Performance	Particle Collection Efficiency (NaCl Particles)		95.0% or higher (98.4%)	95.0% or higher (97.9%)	95.0% or higher (99.4%)	80.0% or higher (88.2%)
	Inhalation Resistance		50Pa or less (35Pa)	50Pa or less (37Pa)	50Pa or less (36Pa)	40Pa or less (29Pa)
	Exhalation Resistance		50Pa or less (35Pa)	36Pa or less (21Pa)	50Pa or less (36Pa)	40Pa or less (28Pa)
	Resistance Increase Value		—— (135Pa)	—— (203Pa)	—— (90Pa)	—— (91Pa)
	CO2 Concentration Increase / Dead Space Volume		1.0% or less / 400cm3 or less (0.45% / 178cm3)	1.0% or less / 400cm3 or less (0.41% / 165cm3)	1.0% or less / 400cm3 or less (0.37% / 149cm3)	1.0% or less / 400cm3 or less (0.73% / 293cm3)
	Wet Resistance Value		—— (31Pa)	—— (22Pa)	—— (30Pa)	—— (23Pa)
	Weight	Standard	350: 12.1g or less (9.1g)	355: 14.1g or less (11.1g)	650: 12.6g or less (9.9g)	550: 12.3g or less (9.8g)
		Hook Type (T)	350T: 12.7g or less (9.7g)	355T: 14.5g or less (11.5g)	650T: 13.1g or less (10.2g)	——
	Maximum Use Time Limit		13 hours	15 hours	20 hours	12 hours

* Values in parentheses ( ) represent the measured average values.

Are you prepared for heatstroke prevention?
Starting June 1, 2025, revised industrial safety regulations will take effect, making heatstroke prevention a mandatory obligation. To prevent severe heatstroke among workers at risk, employers must implement “preparatory measures,” “establish protocols,” and “notify relevant parties.”

Blast away the heat inside your work clothes

VP-300 Personal Cooling Unit

Designed for body cooling in high-temperature environments:

★ No power supply required【*1】
Can be operated without electricity.

★ High cooling performance, compact design
Provides effective cooling in hot environments.

★ Adjustable airflow function【*2】
Adjust airflow volume to suit the specific work environment.

★ Selectable product lines: Collar type and Long-tube type
Options available for collar styles (standard and long).

★ Heat-resistant and impact-resistant materials
Durable materials reduce the unit’s weight on the body, while the temperature control valve ensures efficient cooling operation.

Notes:
【*1】 Uses compressed air available from existing pneumatic systems or cooling air lines.
【*2】 The adjustment function allows the user to change air speed and regulate the temperature accordingly.

Visible Cooling Effectiveness

Values measured with the air adjustment valve set to MAXIMUM (MAX).

Thermal imaging representing body surface temperature

	High temperatures visible in the torso, arms, neck, and head.		Torso temperature is reduced, and cooling effects are clearly visible in the arms, neck, and head.
Before use		During use

Combinable Product Options

Koken FIT-II Qualitative Fit Test Kit

JIS T 8150:2021 Standard

Mandatory Statutory Fit Testing:
Required for welding operations【*1】, and Class III management areas【*2】

• Uses Sodium Saccharin solution (sweet taste component)
• Includes 10 test hoods for multi-person testing
• Features clear labeling to distinguish between sensitivity and fit test solutions

※1 Regulations on fit testing mandated by the Ministry of Health, Labour and Welfare (MHLW Notification No. 286, July 31, 2020).
※2 Statutory fit testing under MHLW Notification No. 91 (effective May 31, 2022; applied from April 2024).

Kit Contents

1. Test Hoods: 10 units
2. Sensitivity Nebulizer: 1 unit
3. Sensitivity Test Solution: 5ml x 12 bottles
4. Fit Test Nebulizer: 1 unit
5. Fit Test Solution: 5ml x 12 bottles
6. Nebulizer base: 1 unit (can be used as a stand for nebulizers)

Replacement Parts

◆ FIT-II Replacement Hoods (10 hoods): 1
◆ FIT-II Replacement Solution Set: 3 & 5 (Sensitivity and Fit Test solutions, 12 bottles each)
◆ FIT-II Replacement Nebulizers (set of 2): 2 & 4 (Includes 2 nebulizers and 2 labels)

Perform your first fit test with confidence!
Video guides for smooth fit testing procedures

VIDEO-GUIDED FIT TESTING

Easily understand the “complete fit test sequence,” ranging from the “threshold screening test” (mandatory before qualitative fit testing) to the actual fit test procedure and corrective actions for failed results. The content also explains key points for instructing and training the test subjects.

Video Content

Introduction to Fit Testing:

• Objectives of fit testing.
• Full fit test workflow.
• Precautions during the testing process.

User Training & Donning:

• Pre-use inspection of the mask.
• Correct donning techniques.
• User seal check methods (positive/negative pressure).

Statutory Fit Test Execution:

• Taste threshold screening method.
• Step-by-step fit test protocol.
• Guidance for failed test results.

1) Normal Breathing Subject stands still and breathes normally as if in a typical work setting. During the test: Subject breathes through the mouth and confirms no sweet taste is detected. Duration: 1 minute

Video: Performing the Fit Test

Pass Criteria: Fit Factor must reach 100 or higher

Video: Assessment guidance and troubleshooting for failed tests

Important points when wearing a mask

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself from inhaling dust while wearing a dust mask, both the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for capturing particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

( ) indicates products without an exhalation valve.

High Efficiency Filter + Ergonomic Face Seal

2. Facepiece Fit Technology

Even if a dust mask has a high collection efficiency filter, it is ineffective if dust leaks through the facepiece seal during use. The primary cause of exposure is the “gap at the facial contact area.” We consider mask fit to be just as important as filter performance. Therefore, our company developed technology to enhance the airtightness of the facial contact area early on.

Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and effortlessly adapts to facial movements, ensuring a comfortable fit and stability during use.

HAWC harness strap
The strap design ensures a high level of fit, maximizing the “suction” effect when wearing the mask to ensure an airtight seal on the face.

Freeposition Underchin
The unique curve of the facial contact area prevents dust entry. The nose section is aligned first, allowing it to accommodate various facial dimensions and providing a secure fit for a wide range of face sizes (see image below).

Fit Status of the Freeposition Underchin Facepiece
(Cross-sectional simulation to show the contact position between the mask and the chin).

For large faces: Uses the outer section of the mask to adjust the fit around the chin.

For small faces: Uses the inner section of the mask to adjust the fit around the chin.

FF Lip		Wearing Stability		Internal Fit Checker
	Designed for various face shapes; the cushion naturally fits your face.		Utilizes a 3D poly-band harness that matches head shapes to enhance fit and seal.		Fit checker is integrated inside, helping to check the mask seal at any time (available for models 1005, 1010A, 1015, 1180 series).

Replaceable Dust Mask
Mighty Micron Filter

The yellow filter is the hallmark
Mighty Micron Filter

Thanks to proprietary technology, this filter is created by electrostatically charging the base wool fiber material. In addition to a strong electrostatic force, a 3-layer structure with a void space between two collection layers achieves low fiber density while combining two opposing characteristics: high collection efficiency and low inhalation resistance.

• Fit checker: Perform a seal test (fit test) simply by operating a lever.
• Under-chin: Unique curve design enhances the seal at the facial contact area.
• Silicone: Uses soft, skin-friendly silicone for a comfortable wearing experience.
• Size S available: Small face size options are available for these models.
• Micron: Employs high-performance electrostatic filters compliant with RL classifications.

Sakai – Model 1005R-08

Integrated Fit Checker – Suitable for welding operations

Model Assay Certificate: TM540
Assigned Protection Factor: 10
Classification: RL2

• Fit Checker (Integrated seal check lever)
• Under-chin support
• Silicone seal
• Size S available
• Micron Filter

Sakai – Model 1005RR-05

Compatible with KBC filter for ozone and organic odor removal
Integrated Fit Checker

Model Assay Certificate: TM541
Assigned Protection Factor: 10

Compatible with KBC filter
Classification: RL2

• Fit Checker
• Under-chin support
• Silicone seal
• Size S available
• Micron Filter

Sakai – Model 1005R-AL-02

Suitable for environments with radiant heat
Aluminized coating
Integrated Fit Checker

Model Assay Certificate: TM543
Assigned Protection Factor: 10

Classification: RL2

• Fit Checker
• Under-chin support
• Silicone seal
• Size S available
• Micron Filter

Sakai – Model 1005RRX-05

Compatible with KBC filter for ozone and organic odor removal
Integrated Fit Checker
4-point head harness

Model Assay Certificate: TM542
Assigned Protection Factor: 10

Compatible with KBC filter
Classification: RL2

• Fit Checker
• Under-chin support
• Silicone seal
• Size S available
• Micron Filter

▲ Shared Replacement Parts for 1005 Series

• Inhalation Valve (Circular)
• Exhalation Valve (T-6K)
• Moisture Sponge (Egg-shaped)

Replacement Filters · Optional Accessories

Mighty Micron Filter for 1005-02	KBC Filter for 1005 (Ozone & organic odor removal, 5 sets/pack) (Optional) → For 1005RR / 1005RRX

（Head Harness Types）
Please replace the head straps periodically.

Collection Efficiency with DOP Particles (using 1005R)

Up to a load of 200 mg of DOP particles, the minimum collection efficiency was 98.74%. Even for DOP particles—which tend to degrade electrostatic forces faster than other oil mists—the Mighty Micron filter maintains very high performance.

Collection Efficiency against Welding Fume (30 mg/m³) – using 1005R

During the accumulation of 100 mg of welding fume, the minimum collection efficiency was 99.927%. After this, the mechanical sieving effect becomes dominant, maintaining extremely high efficiency. → Efficiency at 100 mg load: 99.993%.

Built-in Fit Checker – Rapid Seal Verification

Regardless of filter efficiency, a mask provides no protection if not worn correctly. For this reason, national regulations require replaceable dust masks to have an easy method for fit testing.
Our company was the first in Japan to develop an integrated fit checker, allowing for simpler seal checks. There is no need for external testing equipment; users can verify the fit instantly on-site.
This design encourages workers to perform seal checks every time they don the mask, ensuring consistent safety.

Applicable Series:
1005 series, 1010A, 1015, 1180 series

Simply move the lever to close the inhalation port and perform a negative pressure seal check.

Sakai Model 1010A-06

RL1 Rating
Integrated Fit Checker
Lightest in class: 76 g (compared to other replaceable filter models from Koken)

Model Assay Certificate: TM560
Assigned Protection Factor: 4

• Fit Checker
• Mighty Micron Filter

Replacement Parts

• Inhalation Valve – Oval type (Small)
• Exhalation Valve – T-6K type
• Moisture Sponge – Egg-shaped

Sakai Model 1015-02

RL2 Rating
Integrated Fit Checker
Silicone Facepiece

Model Assay Certificate: TM570
Assigned Protection Factor: 10

• Fit Checker
• Freeposition Underchin design
• Silicone seal
• Mighty Micron Filter

Replacement Parts

• Inhalation Valve (Oval small type)
• Exhalation Valve (T-6K type)
• Moisture Sponge (Egg-shaped)

Important points when wearing a mask

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself while wearing a dust mask, both the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter

Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for capturing particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

( ) indicates products without an exhalation valve.

High Efficiency Filter + Ergonomic Face Seal

2. Facepiece Fit Technology

Even if a dust mask has a high collection efficiency filter, it is ineffective if dust leaks through the facepiece seal during use. This is primarily caused by a “gap at the facial contact area.” We consider mask fit to be as important as filter performance. Therefore, our company has long developed technology to enhance the airtightness of the facial contact area.

Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and effortlessly adapts to facial movements, ensuring a comfortable fit. The material is also stable during use.

HAWC harness strap
The strap design ensures a high level of fit, maximizing the “suction” effect when wearing the mask to ensure an airtight facial seal.

Freeposition Underchin
The unique curve of the facial contact area prevents dust entry. The nose section is aligned first, allowing it to accommodate various facial dimensions and providing a secure fit for a wide range of face sizes (see image below).

Fit Status of the Freeposition Underchin Facepiece
(Cross-sectional simulation to show the contact position between the mask and the chin).

For large faces: Uses the outer section of the mask to adjust the fit around the chin.

For small faces: Uses the inner section of the mask to adjust the fit around the chin.

FF Lip		Wearing Stability		Internal Fit Checker
	Designed for various face shapes; the cushion naturally fits your face.		Utilizes a 3D poly-band harness that matches head shapes to enhance fit and seal.		Fit checker is integrated inside, allowing for seal checks at any time (available for models 1005, 1010A, 1015, 1180 series).

Replaceable Dust Mask
Mighty Micron Filter

（Head Harness Types）
Please replace the head straps periodically.

Koken’s Unique Facial Seal – Extreme Focus on Fit

Shape (Freeposition Underchin Mask)

The “Freeposition Underchin Mask” allows the user, when donning, to first set the nose portion in the correct position. The underchin support then automatically settles into place, achieving an optimal wrap-around fit. Regardless of face size, almost anyone can achieve a secure seal and soft wearing feel with just one mask size.

Material (Silicone – Flexible and Stable)

Silicone material is hypoallergenic and unlikely to cause skin dryness. It remains flexible according to facial expressions, ensuring stable and comfortable wear. Additionally, it is highly resistant to skin oils and easy to clean, making it suitable for long-term use in professional environments.

Features

• Under-chin design: Enhanced seal at the facial contact points due to specialized curvature.
• Silicone: Soft, skin-friendly material for a comfortable wearing experience.
• Size S available: Size options for individuals with smaller facial dimensions.
• Speaking Diaphragm: Enables clear verbal communication and commands while wearing the mask.
• Micron: Employs high-performance electrostatic filters compliant with RL classifications.

Sakai Model 1021R-07

RL2 Rating
Low-profile filter design ensures a clear downward field of vision.
Type Certification: TM545
Assigned Protection Factor: 10

Compatible with KBC filters

• Under-chin Seal
• Silicone Facepiece
• Size S Available
• Micron Filter

Replacement Parts: Exhalation Valve – T-6K type

Sakai Model 1021RX-05

RL2 Rating
4-point head harness prevents mask shifting

Type Certification: TM546
Assigned Protection Factor: 10

Compatible with KBC filters

• Under-chin Seal
• Silicone Facepiece
• Size S Available
• Micron Filter

Replacement Parts: Exhalation Valve – T-6K type

Sakai Model 1091D-04

RL2 Rating
4-point harness with integrated speaking diaphragm
Facilitates verbal communication and instructions while wearing the mask.

Type Certification: TM548
Assigned Protection Factor: 10

Compatible with KBC filters

• Under-chin Seal
• Silicone Facepiece
• Speaking Diaphragm
• Micron Filter

*The Model 1091SD-03 is also available with an RB-type head harness.
Replacement Parts: Exhalation Valve T-1 (T-1 type)

4-Point Support
XRB Type Head Harness (1021RX / 1091D)

The 4-point harness secures the mask at four locations (top, bottom, left, and right) to contour firmly to the face. Even during work involving heavy head movement, the mask remains stable and maintains a tight seal.

▲ Common Replacement Parts for All 3 Models

• Inhalation Valve (Circular)
• Moisture Sponge (Oval type)

Replacement Filters · Optional Accessories

Mighty Micron Filter for Model 1021-02	KBC Filter for 1021 / 1091 (Optional) Ozone and organic odor removal (5 sets per pack) Applicable models: 1021R / 1021RX / 1091D	Fit Tester Type F (Optional) Left & Right Set

Related Protective Equipment

Dust Safety Goggles
Prevent eye injury caused by particulates.

Sakai Model KR-11

These are goggle-style safety glasses designed for easy combination with our half-face dust masks. Equipped with high-performance ventilators and dual-sided anti-fog treated lenses. They can be worn over prescription glasses, ensuring safer operations. (Note: Large glasses may not be compatible.)

High-Performance Ventilators

• Lens: Cellulose-based plastic (dual-sided anti-fog treatment)
• Frame: Soft vinyl
• Headband: Nylon

Dust Protective Hood
Prevents dust accumulation on the head and shoulders.

Sakai – Type A

Sakai – Type C

※ Masks shown in illustrations are not included with the hood.

Note: Product is not water-resistant.

Associated Testing Equipment

Filter Replacement Indicator – Type 7M / 7S

Type 7M (For Medium facepieces):
1005, 1021, 1091, 1121, 1191, 1122, 1181, 7191, 7121, 6061

Type 7S (For Small facepieces):
1005, 1021, 1121, 1122, 1181, 7121

This tester is compatible with masks using Mighty Micron or Alpha Ring filters. Dust accumulation status on the filter is displayed via color-coded indicators, allowing clear confirmation and precise determination of the filter replacement schedule.

Options

• For Model 1010
• For Model 1111 / 1180 (Compatible with 1015)
• Medium Facepiece Connector
• Small Facepiece Connector

※ Not compatible with Model 1180 size S.

• Power Consumption: 50 W
• Power Supply: AC 100 V
• Weight: 6.5 kg

Qualitative Fit Test Kit FIT-Ⅱ

This kit is used for performing qualitative fit testing to assess whether the mask fits the user’s face securely with an airtight seal. (Complies with JIS T 8150)

• Uses Sodium Saccharin solution (sweet taste component).
• Includes 10 hoods, convenient for testing multiple personnel.
• Distinct color-coded labels for easy identification of screening (sensitivity) and fit test solutions.

Important points when wearing a mask

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself from inhaling particles while wearing a dust mask, both the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Through unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for collecting particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

Values in ( ) refer to products without an exhalation valve.

High Performance Filter + Ergonomic Face Seal

2. Facepiece Fit Technology

Even if a dust mask has a high collection efficiency filter, it is ineffective if dust leaks through the seal between the face and the mask. The primary cause is the “gap at the facial contact area.” We consider mask fit to be as important as filter performance. Therefore, our company developed technology to enhance the airtightness of the facepiece seal early on.

Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and effortlessly adapts to facial movements, ensuring a comfortable fit. The material is also stable during long-term use.

HAWC harness strap
The strap design ensures high tension and maximizes the “suction” effect when wearing the mask, ensuring an airtight facial seal.

Freeposition Underchin
The unique curve of the facial contact area prevents dust entry. By aligning the nose section first, it accommodates various facial dimensions, providing a secure fit for a wide range of face sizes (see image below).

Fit Status of the Freeposition Underchin Mask
(Cross-sectional simulation to show the contact position between the mask and the chin).

For large faces: The outer section of the mask adjusts the fit around the chin.

For small faces: The inner section of the mask adjusts the fit around the chin.

FF Lip		Wearing Stability		Built-in Fit Checker
	The cushion naturally conforms to various face shapes and sizes for a seamless fit.		Uses a 3D-shaped polyband harness that contours to the head, enhancing fit and sealing performance.		Built-in fit checker allows you to test the mask’s seal at any time (available for 1005, 1010A, 1015, 1180 series).

Replaceable Dust Mask – Alpha Ring Filter

Alpha Ring Filter with concentric design and compact shape

Paper filters that enhance particle collection efficiency by increasing fiber density traditionally require an expanded surface area to meet airflow resistance standards.
The Alpha Ring filter was the first domestically developed filter using ultra-fine fibers molded into a round pleat structure.
By continuing to expand the filtration surface area, the filter maintains a compact shape while achieving lower breathing resistance, resulting in higher and more stable performance.

All Alpha Ring filters are water-repellent treated

The filter is treated for water repellency to limit the adherence of mist or droplets, ensuring breathing remains easy during use.
Additionally, this treatment is effective against oil mist.

HAWC Lip (High Adaptable Wide Concave)

The facial contact area has a wide concave surface that surrounds the face. When the harness is tightened, a suction effect is created, resulting in high airtightness.

*HAWC stands for High Adaptable Wide Concave
*Image shown is the Model 1021H.

(Head Harness Types)
Please replace head straps periodically.

Sakai Model 1521H

Durable silicone facepiece, easy to clean

Model Assay Certificate: TM534
Assigned Protection Factor: 50 (RL3)

Also applicable for use as a gas mask (1521HG · Class L3)
(Model Assay Certificate: TN399)
Note: Absorbent canisters are sold separately.

• Silicone Construction
• HAWC Lip
• Speaking Diaphragm
• Spatter-shielding Surface

Replacement Parts

• Inhalation Valve: Type 29
• Partitioned Inhalation Valve: Type NC2
• Exhalation Valve: Type T-6K

Sakai Model 1521U

High-safety full-face mask, suitable for nanomaterials

Model Assay Certificate: TM675
Assigned Protection Factor: 50 (RL3)

The particle collection efficiency reaches 99.999% (average value), meeting high safety requirements for handling nanomaterials.
The full-face design combined with the HAWC Lip creates an exceptional airtight seal, significantly enhancing protection levels.

• HAWC Lip
• Speaking Diaphragm
• Anti-fouling Surface
• Silicone Facepiece

Replacement Filters · Optional Accessories

RD-6 (For: 1721H, 1521H, 7121R, 7191DK)	RD-6U (For: 7191DKU, 1521U)	RD-8 (For: 1180H)	LAS-52 (For: 1781DW)	LAS-52C (For: 1781DWC)	(Optional) Fit Tester – Type V Applied models: 1721H, 1521H, 1521U, 7121R, 7191DK, 7191DKU	(Optional) Fit Tester – Type F Applied models: 1781DW, 1781DWC
2 pcs/set — Threaded	2 pcs/set — Threaded	Threaded	2 pcs/set — Threaded	2 pcs/set — Threaded

• Fit Checker: Simply operate the lever to perform a user seal check (fit test).
• Under-Chin: Unique curve enhances the airtight seal between face and mask.
• Silicone: Soft, skin-friendly material; silicone facepiece ensures comfortable long-term wear.
• HAWC Lip: Achieves high airtightness via “suction effect”; applied to full-face models.
• Size S available: Size S options for users with petite faces.
• Low breathing resistance: Employs Alpha Ring filter technology for reduced breathing effort during long shifts.
• Speaking Diaphragm: Integrated device enables clear verbal communication while wearing the mask.
• Activated Carbon: Effectively neutralizes low-concentration ozone; utilizes carbon-impregnated filters.
• Surface Hardening: Visor lens is treated to resist scratches.
• Special Surface Hardening: Advanced coating provides superior scratch protection over standard treatments.

Note: Consumable components and filters should be replaced promptly according to the maintenance schedule.

Important Points When Wearing a Respirator

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself from inhaling dust while wearing a respirator, both the performance of the filter and the “tight seal” (fit) between the mask and the face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for capturing particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

( ) indicates products without an exhalation valve.

High Efficiency Filter + Ergonomic Face Seal

2. Facepiece Fit Technology

Even if a dust mask has a high collection efficiency filter, it is meaningless if particles leak through the seal during use. The primary cause of exposure is the “gap at the facial contact area.” We consider mask fit to be as important as filter performance. Therefore, our company developed technology to enhance the airtightness of the facepiece seal early on.

Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and effortlessly adapts to facial movements, ensuring wearing comfort and stability during use.

HAWC harness strap
The strap design ensures a high level of fit, maximizing the “suction” effect when wearing the mask to ensure an airtight seal on the face.

Freeposition Under-Chin
The special shape of the facial contact area prevents dust entry. The nose section is aligned first, allowing it to accommodate various facial dimensions and providing a secure fit for a wide range of face sizes (see image below).

Fit Status of the Freeposition Under-Chin Facepiece
(Cross-sectional simulation to show the contact position between the mask and the chin).

For large faces: Uses the outer section of the mask to adjust the fit around the chin.

For small faces: Uses the inner section of the mask to adjust the fit around the chin.

FF Lip		Wearing Stability		Internal Fit Checker
	Designed for various face shapes; the cushion naturally fits your face.		Utilizes a 3D poly-band harness that matches head shapes to enhance the feeling of fit and seal.		Fit checker is integrated inside, helping to check the mask seal at any time (available for models 1005, 1010A, 1015, 1180 series).

Replaceable Dust Respirator – Alpha Ring Filter

Alpha Ring Filter with concentric design and compact shape

Paper filters that enhance particle collection efficiency by increasing fiber density often require an expanded surface area to meet airflow resistance standards.
The Alpha Ring filter was the first domestically developed filter using ultra-fine fibers molded into a round pleat structure.
Currently, by continuing to expand the filtration surface area, the filter maintains a compact shape while achieving lower breathing resistance, resulting in higher and more stable performance.

All Alpha Ring filters are water-repellent treated

The filter is treated for water repellency to limit the adherence of mist or droplets, ensuring breathing remains easy during use.
Additionally, this treatment is effective against oil mist.

HAWC Lip (High Adaptable Wide Concave)

The facial contact area has a wide concave surface that surrounds the face. When the harness is tightened, a suction effect is created, resulting in high airtightness.

*HAWC stands for High Adaptable Wide Concave
*Image shown is the Model 1021H.

(Head Harness Types)
Please replace head straps periodically.

Sakaki – Model 1721H-03

High-durability protective goggles and facepiece

RL3 Rating
Type Certification: TM646
Assigned Protection Factor: 50

Additionally, it can be used as a gas mask
(Model 1721HG · Class L3)
(Absorbent canisters sold separately)
(Type Certification: TN75)

• HAWC Lip
• Speaking Diaphragm (facilitates communication and commands)
• Hardened visor surface treatment

Shared Replacement Parts

• Inhalation Valve: circular type
• Partitioned Inhalation Valve: NC type
• Exhalation Valve: T-6K type (white)

Replacement Filters · Optional Accessories

RD-6 (For: 1721H, 1521H, 7121R, 7191DK)	RD-6U (For: 7191DKU, 1521U)	RD-8 (For: 1180H)	LAS-52 (For: 1781DW)	LAS-52C (For: 1781DWC)	(Optional) Fit Tester – Type V Applied models: 1721H, 1521H, 1521U, 7121R, 7191DK, 7191DKU	(Optional) Fit Tester – Type F Applied models: 1781DW, 1781DWC
2 pcs/set — Threaded	2 pcs/set — Threaded	Threaded	2 pcs/set — Threaded	2 pcs/set — Threaded

• Fit Checker: Simply operate the lever to perform a user seal check (fit test).
• Under-Chin: Unique curve enhances the airtight seal between face and mask.
• Silicone: Soft, skin-friendly material; silicone facepiece ensures comfortable long-term wear.
• HAWC Lip: High airtightness achieved through a “suction effect”; applied to full-face models.
• Size S available: Size S options for users with petite faces.
• Low breathing resistance: Employs Alpha Ring filter technology for reduced breathing effort during long shifts.
• Speaking Diaphragm: Integrated device enables clear verbal communication while wearing the mask.
• Activated Carbon: Effectively neutralizes low-concentration ozone; utilizes carbon-impregnated filters.
• Surface Hardening: Visor lens is treated to resist scratches.
• Special Surface Hardening: Advanced coating provides superior scratch protection over standard treatments.

Note: Consumable components and filters should be replaced early and on schedule.

Important points when wearing a mask

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself from inhaling dust while wearing a dust mask, both the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for capturing particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

( ) is for products without an exhalation valve.

High Efficiency Filter + Face-Friendly Surface

2. Surface Engineering for a Better Facial Fit

Even if a dust respirator has a high collection efficiency filter, it is meaningless if dust leaks through the face-to-mask seal during use. This is primarily caused by a “gap at the face contact area when worn.” We consider mask fit to be as important as filter performance. Therefore, our company has developed technology to enhance the airtightness of the facial contact area.

Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and effortlessly adapts to facial movements, ensuring a comfortable fit. The material also remains stable during use.

HAWC harness strap
The strap design ensures a high level of fit, maximizing the “suction” effect when wearing the mask to ensure an airtight seal on the face.

Freeposition Underchin
The unique curve of the face contact area prevents dust from leaking in. By aligning the nose portion first, it accommodates various facial dimensions, providing a secure fit for a wide range of face sizes (see image below).

Fit Status of the Freeposition Underchin Facepiece
(Simulated image with the mask cut away to clearly show where it contacts the chin).

For large faces: Uses the outer section of the mask to adjust the fit around the chin.

For small faces: Uses the inner section of the mask to adjust the fit around the chin.

FF Lip		Wearing Safety		Internal Fit Checker
	Designed for various face shapes; the cushion naturally fits your face.		Utilizes a 3D poly-band harness that matches head shapes to enhance the feeling of fit and seal.		Fit checker is integrated inside, helping to check the mask seal at any time (for 1005, 1010A, 1015, 1180 series).

Replaceable Dust Respirator – Alpha Ring Filter

Alpha Ring Filter with concentric design and compact shape

Paper filters that enhance particle collection efficiency by increasing fiber density often require an expanded surface area to meet airflow resistance standards.
The Alpha Ring filter was the first domestically developed filter using ultra-fine fibers molded into a round pleat structure.
Currently, by continuing to expand the filtration surface area, the filter maintains a compact shape while achieving lower breathing resistance, resulting in higher and more stable performance.

All Alpha Ring filters are water-repellent treated

The filter is treated for water repellency to limit the adherence of mist or droplets, ensuring breathing remains easy during use.
Additionally, this treatment is effective against oil mist.

HAWC Lip (High Adaptable Wide Concave)

The facial contact area has a wide concave surface that surrounds the face. When the harness is tightened, a suction effect is created, resulting in high airtightness.

*HAWC stands for High Adaptable Wide Concave
*Image shown is the Model 1021H.

(Head Harness Types)
Please replace head straps periodically.

Sakai Model 1781DW-02

Protective goggles and mask materials with high durability.
Utilizes HAWC lip for high airtightness seal.

Type Certification: TM405
Assigned Protection Factor: 14 (RL2)

• HAWC Lip
• Low inhalation resistance
• Speaking Diaphragm (facilitates communication/instructions)
• Lens surface hardening

Replacement Parts:

• Inhalation Valve: circular type
• Inhalation Valve with partition: NC type
• Exhalation Valve: T-6K type (white)

When using RL3 high-efficiency filter series or 1781DWC for tasks like welding or grinding, if there is a possibility of sparks, spatter, or hot slag, it is mandatory to install the dedicated inhalation port cover (sold separately) before use.

Sakai Model 1781DWC-02

Utilizes deodorizing filter – long-term use type.
Danger: This is not a gas mask.

Type Certification: TM426
Assigned Protection Factor: 14 (RL2)

• HAWC Lip
• Low inhalation resistance
• Speaking Diaphragm
• Activated Carbon
• Hardened surface

Replacement Parts:

• Inhalation Valve (circular)
• Isolation Inhalation Valve (NC)
• Exhalation Valve T-6K (white)

Replacement Filters · Optional Accessories

RD-6 (for: 1721H, 1521H, 7121R, 7191DK)	RD-6U (for: 7191DKU, 1521U)	RD-8 (for: 1180H)	LAS-52 (for: 1781DW)	LAS-52C (for: 1781DWC)	(Optional) Fit Test Device – Type V Applied to models: 1721H, 1521H, 1521U, 7121R, 7191DK, 7191DKU	(Optional) Fit Test Device – Type F Applied to models: 1781DW, 1781DWC
2 pcs/pack — threaded	2 pcs/pack — threaded	threaded	2 pcs/pack — threaded	2 pcs/pack — threaded

• Fit checker: Simply pull the lever to perform a user seal test.
• Under-chin: Unique curve enhances the airtight seal between face and mask.
• Silicone: Soft, skin-friendly material; silicone seal provides a comfortable fit.
• HAWC Lip: Achieves high airtightness via “suction effect”; applied to full-face models.
• Size S available: Size S options for users with petite faces.
• Low breathing resistance: Employs Alpha Ring filter technology for reduced breathing effort during long shifts.
• Speaking Diaphragm: Integrated device enables clear verbal communication while wearing the mask.
• Activated Carbon: Effectively neutralizes low-concentration ozone; utilizes carbon-impregnated filters.
• Surface Hardening: The visor lens is treated to resist scratches.
• Special Surface Hardening: Advanced coating provides superior scratch protection over standard treatments.

Note: Consumable components and filters should be replaced early and on schedule.

Important Points When Wearing a Respirator

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself from inhaling dust while wearing a mask, both the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for collecting particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

( ) indicates products without an exhalation valve.

High Efficiency Filter + Face-Friendly Surface

2. Surface Engineering for a Better Facial Fit

Even if a dust mask has a high collection efficiency filter, it is meaningless if dust leaks through the facepiece seal during use. This is primarily caused by a “gap at the face contact area when worn.” We consider the fit of the mask to be as important as the filter performance. Therefore, our company has developed technology to enhance the airtightness of the facial contact area.

Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and easily adapts to facial movements, ensuring wearing comfort and stability during use.

HAWC harness strap
The strap design ensures a high level of fit, maximizing the “suction” effect when wearing the mask to ensure an airtight facial seal.

Freeposition Underchin
The special shape of the facial contact area prevents dust from leaking in. By aligning the nose portion first, it accommodates various facial dimensions, providing a secure fit for a wide range of face sizes (see image below).

Fit Status of the Freeposition Underchin Facepiece
(Cross-sectional simulation to show the contact position between the mask and the chin).

For large faces: Uses the outer section of the mask to adjust the fit around the chin.

For small faces: Uses the inner section of the mask to adjust the fit around the chin.

FF Lip		Wearing Safety		Internal Fit Checker
	Designed for various face shapes; the cushion naturally fits your face.		Utilizes a 3D poly-band harness that matches head shapes to enhance the feeling of fit and seal.		Fit checker is integrated inside, helping to check the mask seal at any time (for 1005, 1010A, 1015, 1180 series).

Replaceable Dust Respirator – Alpha Ring Filter

Alpha Ring Filter with concentric design and compact shape

Paper filters that enhance particle collection efficiency by increasing fiber density often require an expanded surface area to meet airflow resistance standards.
The Alpha Ring filter was the first domestically developed filter using ultra-fine fibers molded into a round pleat structure.
Currently, by continuing to expand the filtration surface area, the filter maintains a compact shape while achieving lower breathing resistance, resulting in higher and more stable performance.

All Alpha Ring filters are water-repellent treated

The filter is treated for water repellency to limit the adherence of mist or droplets, ensuring breathing remains easy during use.
Additionally, this treatment is effective against oil mist.

HAWC Lip (High Adaptable Wide Concave)

The facial contact area has a wide concave surface that surrounds the face. When the harness is tightened, a suction effect is created, resulting in high airtightness.

*HAWC stands for High Adaptable Wide Concave
*Image shown is the Model 1021H.

(Head Harness Types)
Please replace head straps periodically.

Sakai Model 7121R-03

The basic RL3 model manufactured by our company
Size S facepiece available

Type Certification: TM644
Assigned Protection Factor: 10 (RL3)

Additionally, it can be used as a gas mask
(Model 7121RG · Class L3)

Absorbent canisters sold separately
Type Certification: TN237

• Under-chin seal (improves face seal contact)
• Silicone facepiece (soft, skin-friendly)
• Size S available

Replacement Parts:

• Inhalation Valve (circular)
• Exhalation Valve T-6K
• Moisture Sponge (egg-shaped)

Replacement Filters · Optional Accessories

RD-6 (For: 1721H, 1521H, 7121R, 7191DK)	RD-6U (For: 7191DKU, 1521U)	RD-8 (For: 1180H)	LAS-52 (For: 1781DW)	LAS-52C (For: 1781DWC)	(Optional) Fit Tester – Type V Applied models: 1721H, 1521H, 1521U, 7121R, 7191DK, 7191DKU	(Optional) Fit Tester – Type F Applied models: 1781DW, 1781DWC
2 pcs/set — Threaded	2 pcs/set — Threaded	Threaded	2 pcs/set — Threaded	2 pcs/set — Threaded

• Fit Checker: Just operate the lever to perform a user seal check (fit test).
• Under-Chin: Unique curve enhances the airtight seal between face and mask.
• Silicone: Soft, skin-friendly material; silicone facepiece ensures comfortable long-term wear.
• HAWC Lip: High airtightness achieved through a “suction effect”; applied to full-face models.
• Size S Available: Small face size options are available for these models.
• Low Breathing Resistance: Alpha Ring filter technology allows for prolonged usage with minimal fatigue.
• Speaking Diaphragm: Integrated device enables clear verbal communication while wearing the mask.
• Activated Carbon: Effectively neutralizes low-concentration ozone; utilizes carbon-impregnated filters.
• Surface Hardening: The visor lens is treated to resist scratches.
• Special Surface Hardening: Advanced coating provides superior scratch protection over standard treatments.

Note: Consumable components and filters should be replaced promptly according to the maintenance schedule.

Important Points When Wearing a Respirator

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself from inhaling dust while wearing a mask, both the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for capturing particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

Values in ( ) are for products without an exhalation valve.

High-Performance Filter + Facepiece Designed for Easy Fit

2. Facepiece Fit Technology

Even if a dust respirator has a high collection efficiency filter, it is meaningless if dust leaks through the face-to-mask seal during use. This is primarily caused by a “gap at the face contact area when worn.” We consider the fit of the mask to be as important as the filter performance. Therefore, our company has developed technologies to enhance the airtightness of the facepiece seal.
Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and effortlessly adapts to body movements, ensuring a comfortable fit and stability during use.

HAWC Lip Structure
The lip design ensures a high degree of adhesion, maximizing the “suction cup” effect when wearing the mask to ensure an airtight facial seal.

Free Position Under Chin
The unique curve of the face contact area prevents dust from leaking in. By aligning the nose portion first, it accommodates various facial dimensions, providing a secure fit for a wide range of face sizes (see image below).

Fit Status of the Free Position Under Chin Mask
(Simulated image with the mask cut away to clearly show where it contacts the chin).

For individuals with large faces: The outer section of the mask rests naturally against the chin to provide a proper fit.

For individuals with small faces: The inner section of the mask naturally positions itself against the chin to secure the fit.

FF Lip		Wearing Stability		Built-in Fit Checker
	Designed to naturally conform to various facial sizes and shapes, providing a seamless fit.		Uses a 3D-shaped polyband harness that conforms to the shape of the head, enhancing fit and sealing performance.		A built-in fit checker allows you to test the mask’s seal at any time (available for the 1005, 1010A, 1015, and 1180 series).

Head Harness Types
Please replace the head straps periodically.

Sakai Model 7191DK-03

Equipped with a speaking diaphragm for clear communication and instructions.

RL3 Classification
Type Certification: TM645
Assigned Protection Factor: 10

Can be used as a gas mask (Model 7191DKG · Class L3)
(Absorbent canisters sold separately)
Type Certification: TN179

• Under Chin Cushion
• Silicone Facepiece
• Speaking Diaphragm

Replacement Parts:

• Inhalation Valve (Circular)
• Exhalation Valve T-1K
• Egg-shaped Moisture Sponge

Sakai Model 7191DKU-02

Suitable for nanomaterial handling.
Particle collection efficiency: 99.999% (average value).
Equipped with a speaking diaphragm allowing conversation while wearing the mask.

RL3 Classification
Type Certification: TM674
Assigned Protection Factor: 10

• Under Chin Cushion
• Silicone Facepiece
• Speaking Diaphragm

Replacement Parts:

• Inhalation Valve (Circular)
• Exhalation Valve T-1K
• Egg-shaped Moisture Sponge

Replacement Filters · Optional Accessories

RD-6 (For: 1721H, 1521H, 7121R, 7191DK)	RD-6U (For: 7191DKU, 1521U)	RD-8 (For: 1180H)	LAS-52 (For: 1781DW)	LAS-52C (For: 1781DWC)	(Optional) Fit Tester – Type V Applied models: 1721H, 1521H, 1521U, 7121R, 7191DK, 7191DKU	(Optional) Fit Tester – Type F Applied models: 1781DW, 1781DWC
2 pcs/set — Threaded	2 pcs/set — Threaded	Threaded	2 pcs/set — Threaded	2 pcs/set — Threaded

• Fit Checker: Just operate the lever to perform a user seal check (fit test).
• Under-Chin: Unique curve enhances the airtight seal between face and mask.
• Silicone: Soft, skin-friendly material; silicone facepiece ensures comfortable long-term wear.
• HAWC Lip: High airtightness achieved through a “suction effect”; applied to full-face models.
• Size S Available: Small face size options are available for these models.
• Low Breathing Resistance: Alpha Ring filter technology allows for prolonged usage with minimal fatigue.
• Speaking Diaphragm: Integrated device enables clear verbal communication while wearing the mask.
• Activated Carbon: Effectively neutralizes low-concentration ozone; utilizes carbon-impregnated filters.
• Surface Hardening: The visor lens is treated to resist scratches.
• Special Surface Hardening: Advanced coating provides superior scratch protection over standard treatments.

Note: Consumable components and filters should be replaced promptly according to the maintenance schedule.

Important points when wearing a mask

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself from inhaling dust while wearing a mask, the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for capturing particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

Values in ( ) are for products without an exhalation valve.

High Efficiency Filter + Face-Friendly Surface

2. Surface Engineering for a Better Facial Fit

Even if a dust mask has a high collection efficiency filter, it is useless if dust leaks in through the facepiece seal. The primary cause of leakage is the “gap at the contact area when wearing the mask.” We consider the fit of the mask to be as important as the filter performance. Therefore, our company has developed technology to enhance the airtightness of the facial contact area.
Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and easily adapts to body movements, ensuring wearing comfort and stability during use.

HAWC harness strap
The strap design ensures a high level of fit, maximizing the “suction” effect when wearing the mask to ensure an airtight seal on the face.

Freeposition Underchin
The special shape of the facial contact area prevents dust entry. The nose section is adjustable for different sizes, ensuring a perfect fit for a wide range of facial dimensions (see image below).

Fit Status of the Freeposition Underchin Facepiece
(Cross-sectional simulation to show the contact position between the mask and the chin).

For large faces: Uses the outer section of the mask to adjust the fit around the chin.

For small faces: Uses the inner section of the mask to adjust the fit around the chin.

FF Lip		Wearing Safety		Internal Fit Checker
	Designed for various face shapes; the cushion naturally fits your face.		Utilizes a 3D poly-band harness that matches head shapes to enhance the feeling of fit and seal.		Fit checker is integrated inside, helping to check the mask seal at any time (for 1005, 1010A, 1015, 1180 series).

Replaceable Dust Respirator – Alpha Ring Filter

Alpha Ring Filter with concentric design and compact shape

Paper filters that enhance particle collection efficiency by increasing fiber density often require an expanded surface area to meet airflow resistance standards.
The Alpha Ring filter was the first domestically developed filter using ultra-fine fibers molded into a round pleat structure.
Currently, by continuing to expand the filtration surface area, the filter maintains a compact shape while achieving lower breathing resistance, resulting in higher and more stable performance.

All Alpha Ring filters are water-repellent treated

The filter is treated for water repellency to limit the adherence of mist or droplets, ensuring breathing remains easy during use.
Additionally, this treatment is effective against oil mist.

HAWC Lip (High Adaptable Wide Concave)

The facial contact area has a wide concave surface that surrounds the face. When the harness is tightened, a suction effect is created, resulting in high airtightness.

*HAWC stands for High Adaptable Wide Concave.
*Image shown is the Model 1021H.

(Head Harness Types)
Please replace head straps periodically.

Sakai Model 1180H

The company’s basic RL3 model – lightweight at only 114 g

Built-in seal check lever (Fit Checker)
Size S available

RL3 Rating
Model Assay Certificate: TM788
Assigned Protection Factor: 10

Can be used as a gas mask with G-7 configuration
(Absorbent canisters sold separately)
Gas Mask Certificate: TN382

• Fit Checker (Integrated seal test lever)
• Under-Chin Ergonomics
• Silicone Seal
• Size S available

Option: Moisture Sponge Type A

Replacement Parts:

• Inhalation Valve: Small 03 type
• Exhalation Valve: T-7 type

Replacement Filters · Optional Accessories

RD-6 (for: 1721H, 1521H, 7121R, 7191DK)	RD-6U (for: 7191DKU, 1521U)	RD-8 (for: 1180H)	LAS-52 (for: 1781DW)	LAS-52C (for: 1781DWC)	(Optional) Fit Test Device – Type V Applied to models: 1721H, 1521H, 1521U, 7121R, 7191DK, 7191DKU	(Optional) Fit Test Device – Type F Applied to models: 1781DW, 1781DWC
2 pcs/set — screw connection	2 pcs/set — screw connection	screw connection	2 pcs/set — screw connection	2 pcs/set — screw connection

• Fit Checker: Simply pull the lever to perform a user seal test.
• Under-Chin: Unique curved shape enhances the seal between face and mask.
• Silicone: Soft, skin-friendly material; silicone seal provides a comfortable fit.
• HAWC Lip: Achieves high airtightness via “suction effect”; applied to full-face models.
• Size S available: Smaller size for individuals with petite faces.
• Low breathing resistance: Uses Alpha Ring filters for reduced breathing effort during long-term use.
• Speaking Diaphragm: Facilitates clear communication and verbal instructions without mask removal.
• Activated Carbon: Simultaneously removes low-concentration ozone; utilizes carbon-impregnated filters.
• Surface Hardening: Visor surface is treated to resist scratches.
• Special Surface Hardening: Enhanced scratch protection compared to standard hardening treatments.

Note: Consumable components and filters should be replaced early and on schedule.

Would you like me to explain the differences between the RL2 and RL3 classifications mentioned in this document?

Important points when wearing a mask

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself from inhaling particles while wearing a dust mask, both the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for collecting particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

Values in ( ) are for products without an exhalation valve.

High Efficiency Filter + Face-Friendly Surface

2. Surface Engineering for a Better Facial Fit

Even if a dust mask has a high collection efficiency filter, it is useless if dust leaks in through the facepiece seal. The primary cause of leakage is the “gap at the contact area when wearing the mask.” We consider the fit of the mask to be as important as the filter performance. Therefore, our company has developed technology to enhance the airtightness of the facial contact area.

Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and easily adapts to body movements, ensuring wearing comfort and stability during use.

HAWC Harness
The harness design ensures high tension and maximizes the “suction” effect when wearing the mask, guaranteeing an airtight seal on the face.

Freeposition Underchin
The special shape of the facial contact area prevents dust entry. The nose section is adjustable for different sizes, ensuring a perfect fit for a wide range of facial dimensions (see image below).

Fit Status of the Freeposition Underchin Facepiece
(Cross-sectional simulation to show the contact position between the mask and the chin).

For large faces: Uses the outer section of the mask to adjust the fit around the chin.

For small faces: Uses the inner section of the mask to adjust the fit around the chin.

FF Lip		Wearing Safety		Internal Fit Checker
	Designed for various face shapes; the cushion naturally fits your face.		Utilizes a 3D poly-band harness that matches head shapes to enhance the feeling of fit and seal.		Built-in fit checker allows for seal checks at any time (for models 1005, 1010A, 1015, 1180 series).

Head Strap Types
Please replace the head straps periodically.

Sakaki – Model 1181R-03

RL2 Classification
Low inhalation resistance: 37 Pa
Dual filter type, suitable for long work hours.

Model Assay Certificate: TM224
Assigned Protection Factor: 10

• Undercut (Seal enhancement design)
• Silicone Facepiece
• Low Respiratory Resistance
• Size S Available

Replacement Parts: Exhalation valve: T-6K type

Sakaki – Model 1181RC-02

RL2 Classification
Dual filter type, low inhalation resistance
Uses activated carbon blended filters.

Danger: This is not a dedicated gas mask for high concentrations.

Model Assay Certificate: TM230
Assigned Protection Factor: 10

• Undercut (Seal enhancement design)
• Silicone Facepiece
• Size S Available
• Low Respiratory Resistance
• Activated Carbon

Particle Collection Efficiency	95.0% or higher (Average 99.0%)
Inhalation Resistance	50Pa or less (Average 35Pa)
Exhalation Resistance	52Pa or less (Average 31Pa)
Inhalation Resistance Increase	― (Average 41Pa)
Weight	165g or less (Average 141g)
Harness	RB Type

Replacement Parts: Exhalation valve: T-6K type

▲ Shared Replacement Parts for 6 Models (1181R-03, 1121R-08, 1191SD-03, etc.)

• Inhalation valve: circular type
• Moisture sponge: oval type

Note:
When using 1181RC or 1180C for welding or grinding where sparks or spatter occur, it is mandatory to install the dedicated inhalation port cover (sold separately) before use.

Replacement Filters · Optional Accessories

LAS-52 (for Model 1181R)	LAS-52C (for Model 1181RC)	LAS-1 (for Models 1121R, 1121RX, 1191SD, 1191D)	LAS-51 (for Model 1180)	LAS-51C (for Model 1180C)	KBC Filter for 1121 / 1191 (Ozone & organic odor removal – pack of 5) For: 1121R / 1121RX / 1191SD / 1191D / 1122R (Optional)	Fit Test Device – Type F For: 1181R, 1181RC, 1121R, 1121RX, 1191SD, 1191D (Optional)
Screw-in – pack of 2	Screw-in – pack of 2	Pack of 2	Screw-in – pack of 2	Screw-in – pack of 2

• Under Chin Design: Specialized curve enhances seal at facial contact points.
• Silicone: Soft, skin-friendly material for a comfortable wearing experience. Facepiece seal uses silicone.
• Size S Available: Size S is available for users with smaller faces.
• Low Inhalation Resistance: Uses Alpha Ring filters with low breathing resistance, allowing for long work hours.
• Speaking Diaphragm: Allows communication and commands while wearing the mask.
• Activated Carbon: Effectively removes low-concentration ozone using carbon-treated filters.
• Micron Filter: High-efficiency electrostatic filter material compliant with RL classification.
• Fit Checker: Lever mechanism for easy seal testing.

Double-Layer Bonnet Structure The exhalation valve is shielded inside the bonnet from external factors like wind. Exhaled air accumulated in the upper bonnet acts as a barrier, preventing direct external impact and protecting the valve. This significantly improves exhalation valve performance and stability under real usage conditions.
	Note on Replacement Always replace filters and wearable parts promptly as recommended.

Important points when wearing a mask

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself while wearing a dust mask, both the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for capturing particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

Values in ( ) are for products without an exhalation valve.

High Efficiency Filter + Face-Friendly Surface

2. Surface Engineering for a Better Facial Fit

Even if a dust mask has a high collection efficiency filter, it is useless if dust leaks in through the facepiece seal. The primary cause of leakage is the “gap at the contact area when wearing the mask.” We consider the fit of the mask to be as important as the filter performance. Therefore, our company has developed technology to enhance the airtightness of the facial contact area.
Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and easily adapts to body movements, ensuring wearing comfort and stability during use.

HAWC Harness
The harness design ensures high tension and maximizes the “suction” effect when wearing the mask, guaranteeing an airtight seal on the face.

Freeposition Underchin
The special shape of the facial contact area prevents dust entry. The nose section is adjustable for different sizes, ensuring a perfect fit for a wide range of facial dimensions (see image below).

Fit Status of the Freeposition Underchin Facepiece
(Cross-sectional simulation to show the contact position between the mask and the chin).

For large faces: Uses the outer section of the mask to adjust the fit around the chin.

For small faces: Uses the inner section of the mask to adjust the fit around the chin.

FF Lip		Wearing Safety		Internal Fit Checker
	Designed for various face shapes; the cushion naturally fits your face.		Utilizes a 3D poly-band harness that matches head shapes to enhance the feeling of fit and seal.		Built-in fit checker allows for seal checks at any time (for models 1005, 1010A, 1015, 1180 series).

Head Strap Types
Please replace the head straps periodically.

Sakai – Model 1121R-08

RL2 – Dual filter mask, easy to breathe

Type Certification: TM231
Assigned Protection Factor: 10
Compatible with KBC filter

• Under Chin Design
• Silicone Facepiece
• Size S available

Sakai – Model 1121RX-04

RL2 – Stable fit with 4-point head strap

Type Certification: TM311
Assigned Protection Factor: 10
Compatible with KBC filter

• Under Chin Design
• Silicone Facepiece
• Size S available

Replacement Parts: Exhalation valve: T-6K type

▲ Shared Replacement Parts for 6 Models (1181R-03, 1121R-08, 1191SD-03, etc.)

• Inhalation valve: Circular type
• Moisture sponge: Oval type

Replacement Filters · Optional Accessories

LAS-52 (for 1181R)	LAS-52C (for 1181RC)	LAS-1 (for 1121R, 1121RX, 1191SD, 1191D)	LAS-51 (for 1180)	LAS-51C (for 1180C)	KBC Filter for 1121 / 1191 (Ozone & organic odor removal – pack of 5) For: 1121R / 1121RX / 1191SD / 1191D / 1122R (Optional)	Fit Test Device – Type F For: 1181R, 1181RC, 1121R, 1121RX, 1191SD, 1191D (Optional)
Screw-in connection – Pack of 2	Screw-in connection – Pack of 2	Pack of 2	Screw-in connection – Pack of 2	Screw-in connection – Pack of 2

• Underchin: Specialized curve improves facial seal.
• Silicone: Soft, skin-friendly material provides a comfortable wearing experience. Facepiece uses a silicone seal.
• Size S available: Smaller facial dimensions are catered for with Size S.
• Low Resistance: Uses Alpha Ring filter for low breathing effort, suitable for long-duration work.
• Speaking Diaphragm: Enables clear communication and commands while wearing the mask.
• Activated Carbon: Simultaneously removes low-concentration ozone using carbon-treated filters.
• Micron Filter: High-efficiency electrostatic filter compliant with RL classification.
• Fit Checker: Simple lever mechanism to perform fit tests at any time.

Double-Layer Bonnet Structure The exhalation valve is shielded inside the bonnet, protecting it from external factors like wind. Exhaled air within the upper bonnet acts as a barrier, preventing direct external impact and protecting the valve. This significantly improves exhalation valve performance and stability under real usage conditions.
	Note on Replacement Always replace consumable parts like filters early as recommended.

Important points when wearing a mask

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself from inhaling dust while wearing a mask, the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Through unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for collecting particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

( ) indicates products without an exhalation valve.

High Efficiency Filter + Face-Friendly Surface

2. Surface Engineering for a Better Facial Fit

Even if a dust mask has a high collection efficiency filter, it is useless if dust leaks in through the facepiece seal. The primary cause of leakage is the “gap at the contact area when wearing the mask.” We consider the fit of the mask to be as important as the filter performance. Therefore, our company has developed technology to enhance the airtightness of the facial contact area.
Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and easily adapts to body movements, ensuring wearing comfort and stability during use.

HAWC Harness
The harness design ensures high tension and maximizes the “suction” effect when wearing the mask, guaranteeing an airtight seal on the face.

Freeposition Underchin
The special shape of the facial contact area prevents dust entry. The nose section is adjustable for different sizes, ensuring a perfect fit for a wide range of facial dimensions (see image below).

Fit Status of the Freeposition Underchin Facepiece
(Cross-sectional simulation to show the contact position between the mask and the chin).

For large faces: Uses the outer section of the mask to adjust the fit around the chin.

For small faces: Uses the inner section of the mask to adjust the fit around the chin.

FF Lip		Wearing Safety		Internal Fit Checker
	Designed for various face shapes; the cushion naturally fits your face.		Utilizes a 3D poly-band harness that matches head shapes to enhance the feeling of fit and seal.		Fit checker is integrated inside, helping to check the mask seal at any time (for 1005, 1010A, 1015, 1180 series).

Head Strap Types
Please replace the head straps periodically.

Sakaki – Model 1191SD-03

RL2 Classification – Easy to wear with RB-style harness

Model Assay Certificate: TM318
Assigned Protection Factor: 10
Compatible with KBC filters

• Undercut Seal
• Silicone Facepiece
• Speaking Diaphragm

Sakaki – Model 1191D-03

RL2 Classification – Equipped with speaking diaphragm for easy communication and commands

Model Assay Certificate: TM232
Assigned Protection Factor: 10
Compatible with KBC filters

• Undercut Seal
• Silicone Facepiece
• Speaking Diaphragm

Replacement Parts: Exhalation valve – T-1 type

▲ Common Replacement Parts for 6 Models (1181R-03, 1121R-08, 1191SD-03, etc.)

• Inhalation valve: circular type
• Moisture sponge: oval type

Replacement Filters · Optional Accessories

LAS-52 (for 1181R)	LAS-52C (for 1181RC)	LAS-1 (for 1121R, 1121RX, 1191SD, 1191D)	LAS-51 (for 1180)	LAS-51C (for 1180C)	KBC Filter for 1121 / 1191 (Ozone & organic odor removal – pack of 5) For models: 1121R / 1121RX / 1191SD / 1191D / 1122R (Optional)	Fit Checker – Type F For models: 1181R, 1181RC, 1121R, 1121RX, 1191SD, 1191D (Optional)
Screw-in – pack of 2	Screw-in – pack of 2	Pack of 2	Screw-in – pack of 2	Screw-in – pack of 2

• Under Chin: Enhanced facial seal thanks to the specialized ergonomic curve.
• Silicone: Soft, skin-friendly material for a comfortable wearing experience.
• Small Size Available: Option for users with smaller facial dimensions.
• Low Inhalation Resistance: Employs Alpha Ring filter technology for reduced breathing effort.
• Speaking Diaphragm: Allows for verbal communication and commands while wearing the mask.
• Activated Carbon: Simultaneously removes low concentrations of ozone.
• Micron: High-efficiency electrostatic filter material compliant with RL classification.
• Fit Checker: Simple lever mechanism to perform fit tests at any time.

Double-Layer Bonnet Structure The exhalation valve is shielded within the bonnet, protecting it from external elements like wind. Exhaled air within the upper bonnet acts as a barrier, improving valve stability and performance during active site use.
	Note on Replacement Consumable parts such as filters should be replaced promptly as recommended.

Important points when wearing a mask

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself while wearing a dust mask, both the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for capturing particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

Values in ( ) are for products without an exhalation valve.

High Efficiency Filter + Face-Friendly Surface

2. Surface Engineering for a Better Facial Fit

Even if a dust mask has a high collection efficiency filter, it is useless if dust leaks in through the facepiece seal. The primary cause of leakage is the “gap at the contact area when wearing the mask.” We consider the fit of the mask to be as important as the filter performance. Therefore, our company has developed technology to enhance the airtightness of the facial contact area.

Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and easily adapts to body movements, ensuring wearing comfort and stability during use.

HAWC Harness
The harness design ensures high tension and maximizes the “suction” effect when wearing the mask, guaranteeing an airtight seal on the face.

Freeposition Under-Chin
The special shape of the facial contact area prevents dust entry. The nose section is adjustable for different sizes, ensuring a perfect fit for a wide range of facial dimensions (see image below).

Fit Status of the Freeposition Under-Chin Facepiece
(Cross-sectional simulation to show the contact position between the mask and the chin).

For large faces: Uses the outer section of the mask to adjust the fit around the chin.

For small faces: Uses the inner section of the mask to adjust the fit around the chin.

FF Lip		Wearing Safety		Internal Fit Checker
	Designed for various face shapes; the cushion naturally fits your face.		Utilizes a 3D poly-band harness that matches head shapes to enhance the feeling of fit and seal.		Built-in fit checker allows for seal checks at any time (for models 1005, 1010A, 1015, 1180 series).

Harness Types
Please replace the harness regularly.

Sakaki – Model 1180-05

Double-layer bonnet structure protecting the exhalation valve.

RL2 Classification
Built-in Fit Checker
Compact, lightweight model – 99 g
Size S available

Model Assay Certificate: TM538
Assigned Protection Factor: 10

Can be used as a gas mask (G-7 configuration)
(Absorbent canisters sold separately)

Gas Mask Certificate: TN382

Option: Moisture Sponge Type A

• Fit Checker (rapid seal test)
• Under-Chin cushion
• Silicone facepiece
• Size S available

Particle Collection Efficiency	95.0% or higher (Average 98.0%)
Inhalation Resistance	80Pa or less (Average 72Pa)
Exhalation Resistance	45Pa or less (Average 25Pa)
Inhalation Resistance Increase	― (Average 123Pa)
Weight	114g or less (Average 99g)
Harness	RB Type

Consumable Parts:

• Inhalation valve: Small 03 type
• Exhalation valve: T-7 type

Sakaki – Model 1180C-05

Equipped with Activated Carbon Filter

RL2 Classification
Suitable for organic odors and ozone below permissible levels
Built-in Fit Checker

Warning: Not a dedicated gas mask for high concentrations.

Model Assay Certificate: TM539
Assigned Protection Factor: 10

Option: Moisture Sponge Type A

• Fit Checker (rapid seal test)
• Under-Chin cushion
• Silicone facepiece
• Size S available
• Low inhalation resistance
• Activated carbon filter

Particle Collection Efficiency	95.0% or higher (Average 98.8%)
Inhalation Resistance	80Pa or less (Average 71Pa)
Exhalation Resistance	45Pa or less (Average 27Pa)
Inhalation Resistance Increase	― (Average 133Pa)
Weight	113g or less (Average 98g)
Harness	RB Type

Consumable Parts:

• Inhalation valve: Small 03 type
• Exhalation valve: T-7 type

▲ Shared Replacement Parts for 6 Models (1181R-03, 1121R-08, 1191SD-03, etc.)

• Inhalation valve: circular type
• Moisture sponge: oval type

Replacement Filters · Optional Accessories

LAS-52 (for 1181R)	LAS-52C (for 1181RC)	LAS-1 (for 1121R, 1121RX, 1191SD, 1191D)	LAS-51 (for 1180)	LAS-51C (for 1180C)	KBC Filter for 1121 / 1191 (Ozone & organic odor removal – pack of 5) For: 1121R / 1121RX / 1191SD / 1191D / 1122R (Optional)	Fit Test Device – Type F For: 1181R, 1181RC, 1121R, 1121RX, 1191SD, 1191D (Optional)
Screw-in – Pack of 2	Screw-in – Pack of 2	Pack of 2	Screw-in – Pack of 2	Screw-in – Pack of 2

• Under Chin: Specialized curve enhances seal at facial contact points.
• Silicone: Soft, skin-friendly material provides a comfortable wearing feel. Facepiece seal uses silicone.
• Size S Available: Small size option for users with petite faces.
• Low Resistance: Uses Alpha Ring filter for low breathing resistance, allowing for long-duration work.
• Speaking Diaphragm: Allows communication and instructions to be heard without removing the mask.
• Activated Carbon: Effectively removes low-concentration ozone using carbon-treated filters.
• Micron: High-performance electrostatic filter compliant with RL classification.
• Fit Checker: Perform a manual seal test by simply operating the lever.

Double-Layer Bonnet Structure The exhalation valve is shielded inside the bonnet from external factors like wind. Exhaled air accumulated in the upper bonnet acts as a buffer (barrier), preventing direct external impact and protecting the valve. This significantly improves exhalation valve performance and stability under real usage conditions.
	Note on Replacement Always replace filters and consumable parts according to recommended schedules.

Important points when wearing a mask

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself while wearing a dust mask, both the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for capturing particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter

Increasing the fiber density of the filter enhances collection efficiency. To meet airflow resistance standards, paper filters traditionally require an expanded surface area.

For the first time in Japan, ultra-fine fibers were formed into pristine circular shapes in a single process, creating the Alpha Ring filter. Today, this filter continues to succeed in expanding the surface area while maintaining a compact shape, significantly reducing airflow resistance.

Applied products are from page P.8 to P.11

Dust Respirator Standards

In addition to JIS standards, dust respirators are tested according to assay standards based on national regulations. These standards are comprehensive, ensuring that products meeting strict safety requirements are manufactured.

Note: The table below is excerpted from the “Dust Respirator Standards”.

Values in ( ) are for products without an exhalation valve.

High Efficiency Filter + Face-Friendly Surface

2. Surface Engineering for a Better Facial Fit

Even if a dust mask has a high collection efficiency filter, it is useless if dust leaks in through the facepiece seal. The primary cause of leakage is the “gap at the contact area when wearing the mask.” We consider the fit of the mask to be as important as the filter performance. Therefore, our company has developed technology to enhance the airtightness of the facial contact area.
Silicone Facepiece
Silicone is a hypoallergenic material that is gentle on the skin. Its surface is flexible and easily adapts to body movements, ensuring wearing comfort and stability during use.

HAWC Harness
The harness design ensures high tension and maximizes the “suction” effect when wearing the mask, guaranteeing an airtight seal on the face.

Freeposition Underchin
The special shape of the facial contact area prevents dust entry. The nose section is adjustable for different sizes, ensuring a perfect fit for a wide range of facial dimensions (see image below).

Fit Status of the Freeposition Underchin Facepiece
(Cross-sectional simulation to show the contact position between the mask and the chin).

For large faces: Uses the outer section of the mask to adjust the fit around the chin.

For small faces: Uses the inner section of the mask to adjust the fit around the chin.

FF Lip		Wearing Safety		Internal Fit Checker
	Designed for various face shapes; the cushion naturally fits your face.		Utilizes a 3D poly-band harness that matches head shapes to enhance the feeling of fit and seal.		Built-in fit checker allows for seal checks at any time (for models 1005, 1010A, 1015, 1180 series).

Harness Types
Please replace the harness regularly.

Sakai – Model 1122R-03

Dust and Toxic Gas Mask – Dual-protection line for enhanced air filtration efficiency

Model Assay Certificate: TM209
Assigned Protection Factor: 10
Compatible with KBC filters

• Under-chin seal: Soft silicone facepiece
• Size S available for small faces
• Low respiratory resistance for improved filtration efficiency

Compatible with LAS-12 filters
Optional: Type F Fit Tester

Replacement Parts:

• Circular Inhalation Valve
• Exhalation Valve (T-6K)
• Egg-shaped Moisture Sponge

▲ Shared Replacement Parts for 6 Models (1181R-03, 1121R-08, 1191SD-03, etc.)

• Inhalation valve: circular type
• Moisture sponge: oval type

Replacement Filters · Accessories (Optional)

LAS-52 (for 1181R)	LAS-52C (for 1181RC)	LAS-1 (for 1121R, 1121RX, 1191SD, 1191D)	LAS-51 (for 1180)	LAS-51C (for 1180C)	KBC Filter for 1121 / 1191 (Ozone & organic odor removal – pack of 5) For: 1121R / 1121RX / 1191SD / 1191D / 1122R (Optional)	Type F Fit Tester For: 1181R, 1181RC, 1121R, 1121RX, 1191SD, 1191D (Optional)
Screw-in – Pack of 2	Screw-in – Pack of 2	Pack of 2	Screw-in – Pack of 2	Screw-in – Pack of 2

• Under Chin: Specialized curve enhances seal at facial contact points.
• Silicone: Soft, skin-friendly material provides a comfortable wearing feel. Facepiece seal uses silicone.
• Size S Available: Small size option for users with petite faces.
• Low Resistance: Uses Alpha Ring filter for low breathing resistance, allowing for long-duration work.
• Speaking Diaphragm: Allows conversation and instructions to be heard without removing the mask.
• Activated Carbon: Effectively removes low-concentration ozone using carbon-treated filters.
• Micron: High-performance electrostatic filter compliant with RL classification.
• Fit Checker: Perform a manual seal test by simply operating the lever.

Double-Layer Bonnet Structure The exhalation valve is shielded inside the bonnet from external factors like wind. Exhaled air accumulated in the upper bonnet acts as a buffer (barrier), preventing direct external impact and protecting the valve. This significantly improves exhalation valve performance and stability under real usage conditions.
	Note on Replacement Always replace filters and consumable parts according to recommended schedules.

Important points when wearing a mask

Dust masks utilize high-efficiency filters to effectively prevent the inhalation of hazardous particles. To protect yourself while wearing a dust mask, both the performance of the filter and the “tight seal” (fit) between the mask and your face are critical.

1. Filter Technology with High Particle Collection Efficiency

Mighty (Uni) Micron Filter
Using unique technology, wool fibers are electrostatically charged, allowing electrostatic force to draw particles to the fiber surface. This is the primary mechanism for capturing particles. A high-density fiber structure is unnecessary, successfully integrating the two contrasting features: “high collection efficiency” and “low inhalation resistance.” It consistently maintains the highest standard of performance and quality, making it an excellent long-term filter solution.

Applied products are on P.4 ~ 6, P.11

Alpha Ring Filter