How do you figure your size?

I spoke with 3M tech support, and the guy explained it like this: "70% of users will fit the size medium. 23% will fit size large. The rest will fall in the small category." I assume that the reason 93% fit medium to large because men typically are the users. I am 6', 225lb guy that wears a medium. My 5'4" wife uses small. I can almost wear a large, but larges are set for people with long faces.

What filters come with it?

None - you order the filters separately. There are several/many different filters depending on what your application is. Simply sawdust? Chemical fumes? Buy the filters that fit your use.

Even after reading the q&a i'm still confused as to which filter i need. i just need dust particle filtration for woodworking. shape/model #?

A set of the 3M P100 filters work great. I use the 2091 model for woodworking. The P is for particulate and the 100 means it filters 100%. For anything with fumes like finishes I use a paint set of filters like the 3M 6001

What is the difference between this mask and the 3m(tm) half facepiece respirator assembly 6291 ?

This one is made with silicone that seals against your face which is more comfortable and durable. If you plan on wearing it often or for long periods of time get this one.

3m Reusable Respirator Half Facepiece 7501 Niosh Small

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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Description

🛡️ Elevate your safety game with breathable, durable protection that works as hard as you do.

FOG FREE VISION - Exhalation valve cover directs moisture downward, minimizing fogging so you never miss a detail.
COMFORT MEETS DURABILITY - Advanced silicone material ensures a flexible, pressure-point-free fit that lasts through tough jobs.
QUICK ADJUST HEAD HARNESS - Dual-mode, one-hand latch system lets you don and doff with ease—stay focused, stay efficient.
BREATHE EFFORTLESSLY ALL DAY - Innovative CoolFlow valve reduces heat and moisture for cool, dry comfort during extended wear.
CERTIFIED INDUSTRIAL PROTECTION - NIOSH-approved to guard against airborne hazards with trusted 3M cartridges and filters.

The 3M 7501 Reusable Respirator Half Facepiece combines NIOSH-certified protection with advanced silicone comfort and a proprietary CoolFlow valve to reduce breathing resistance and moisture buildup. Designed for professional use in industries like painting, welding, and chemical handling, it features a quick-adjust head harness and an exhalation valve cover to reduce fogging. Lightweight and durable, this respirator supports a broad range of 3M cartridges and filters, ensuring reliable respiratory defense in demanding environments.

Specifications

ASIN	B008MCUS28
Best Sellers Rank	#8,364 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Reusable Respirators
Brand Name	3M
Color	Gray
Customer Reviews	4.7 4.7 out of 5 stars (1,427)
Fit Type	Regular
Global Trade Identification Number	50051131370819
Import Designation	Made in the USA
Included Components	Mask
Item Package Quantity	1
Item Type Name	reusable-respirator
Item Weight	91 g
Manufacturer	3M
Material	Silicone
Material Features	Recyclable
Number of Items	1
Part Number	051131370819
Product Style	Half Face Cover
Reusability	Reusable
Size	Small
Special Features	Exhalation Valve, Reusable
Style Number	7501
Unit Count	1 Count
Warranty Description	Manufacturer

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