How do I know what size this mask is? I'm reading the reviews saying it comes in 3 sizes S, M, L but it doesn't say anywhere on the description.

I can tell you that I found the medium size too large for me. I am 5' 11" and do not have a small face.

Does a pair of P100-certified filters come with the mask or are those sold separately?

Mine did not come with filters. The bag indicates they should have been packaged together with the mask so they may have been removed prior to shipping.

what is the NIOSH rating? N100?

Dust Mask and Filter Cartridge Ratings Respiratory Filters come in a variety of ratings that relate to how the respirator performs (how much it filters) and what environment type it is designed to be used in. When choosing a respirator it's important to understand that as the letter rating and number rating increase, breathing fatigue will increase. While you certainly don't want to choose a rating that is too low, you don't necessarily always want to pick a P100 filter for every application - particularly if you're just looking for a simple dust mask to do home improvement work. Typically, an end user will find an N95 respirator cooler, and easier to breath through than a P99 or P95 dust mask. Respirator Rating Letter Class N - Not oil resistant R - Resistant to oil P - Oil Proof Respirator Rating Number Class 95 - Removes 95% of all particles that are at least 0.3 microns in diameter 99 - Removes 99% of particles that are at least 0.3 microns in diameter 100 - Removes 99.97% of all particles that are 0.3 microns in diameter or larger. HE or HEPA quality filter.

Would this be an appropriate mask for woodworking, specifically when sanding (or cutting MDF) and lots of ultra fine particles are in the air?

Yes, just be sure to get the right filter. 3M makes lots of them, and you can get the right tables from them. I use the cartridge P100 for metal dusts.

3m Half Facepiece Reusable Respirator Assembly Kit 6191 Small 1

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Description

🛡️ Gear up with 3M: Where safety meets next-level comfort and control!

CUSTOMIZABLE COMFORT FIT - Soft, lightweight thermoplastic elastomer facepiece with easy-adjust head straps for all-day wear without fatigue.
MODULAR REUSABLE DESIGN - Replaceable filters and cartridges extend product life and maximize cost efficiency—built to keep up with your toughest projects.
VERSATILE APPLICATION RANGE - Ideal for welding, soldering, metal pouring, and protection against lead, asbestos, cadmium, and more—trusted by pros who demand safety.
ENHANCED VISIBILITY BALANCE - Swept-back cartridge design improves field of vision and ergonomic balance, so you stay focused and agile on the job.
INDUSTRIAL GRADE RESPIRATORY DEFENSE - Certified NIOSH P100 filters block 99.97% of airborne particles, ensuring elite protection in hazardous environments.

The 3M 6191 Half Facepiece Reusable Respirator Assembly Kit combines a lightweight, soft thermoplastic elastomer facepiece with NIOSH-approved P100 particulate filters, delivering up to 10 times the permissible exposure limit protection against oil and non-oil based particles. Featuring a bayonet connection for easy filter replacement, adjustable head straps for a personalized fit, and a swept-back cartridge design for improved visibility and balance, this respirator is engineered for industrial professionals engaged in welding, soldering, and hazardous material handling. Durable, reusable, and compliant with federal safety standards, it’s the trusted choice for superior respiratory protection in demanding work environments.

Specifications

ASIN	B008MCUVN4
Best Sellers Rank	#39,847 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #43 in Reusable Respirators
Brand Name	3M
Closure Type	Strap
Color	Gray
Customer Reviews	4.3 4.3 out of 5 stars (841)
Fabric Type	Thermoplastic Elastomer
Filter Class	P100
Fit Type	Regular
Global Trade Identification Number	00051131070011
Import Designation	Made in the USA
Included Components	3M 6000 Series Half Facepiece Reusable Respirator and two 3M 2091 P100 Particulate Filters
Item Package Quantity	1
Item Type Name	Respirator
Item Weight	4.64 ounces
Manufacturer	3M
Material	Thermoplastic Elastomers
Material Features	Recyclable
Number of Items	1
Part Number	051131070016
Pattern	Respirator Assembly
Product Style	Half Facepiece Reusable Respirator
Recommended Uses For Product	Welding
Reusability	Reusable
Size	1 Count (Pack of 1)
Special Features	Adjustable Headband, Lightweight
Specification Met	NIOSH
Style Number	6191
UPC	051131070011
Unit Count	1 Count
Warranty Description	As Labeled

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S$69

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In stock

Sold byAmazon SINGAPOREDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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3M Half Facepiece Reusable Respirator Assembly Kit 6191, Small, 1 Kit

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