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.

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🛡️ Stay protected, breathe freely, and lead with confidence.

FOG FREE VISION - Exhalation valve cover directs breath downward to minimize fogging on safety glasses.
CUSTOM FIT ANYTIME - Dual-mode head harness adapts quickly between standard and drop-down modes.
BREATHE EASY WORK HARD - Proprietary 3M CoolFlow valve reduces heat and moisture for effortless breathing.
COMFORT MEETS DURABILITY - Advanced silicone material ensures all-day wear without irritation.
SIZE CODED FOR PRECISION - Color-coded design guarantees the perfect large fit every time.

The 3M 7503 Large Reusable Half Face Mask combines advanced silicone comfort with a proprietary CoolFlow valve for easier breathing. Its dual-mode adjustable harness and color-coded sizing ensure a secure, personalized fit, while the exhalation valve cover reduces fogging—making it the go-to respirator for professionals demanding durable, reusable respiratory protection.

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$163.70

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Manufacturer	3M
Part number	051131370833
Item Weight	139 g
Product Dimensions	17.78 x 25.4 x 14.61 cm; 138.98 g
Item model number	7503/37083(AAD)
Size	1 count (Pack of 1)
Style	Basic,Protection
Material	Rubber
Item Package Quantity	1
Number of Pieces	2
Special Features	Reusable
Batteries included?	No
Batteries Required?	No

3M 7503 Reusable Half Face Mask, Large

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