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3M Half Facepiece Reusable Respirator Assembly Kit 6391, Size Large, P100, Lightweight, Comfortable, Easy to Adjust, Includes 2091 Particulate Filter, Welding, Soldering, Asbestos

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$23.79

$ 11 .99 $11.99

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About this item

  • NIOSH APPROVED: For environments containing certain oil and non-oil based particles
  • ASSEMBLY INCLUDES: Half facepiece respirator and particulate filter 2091 P100
  • HALF FACEPIECE DESIGN: Combines comfort and convenience
  • REMARKABLY COMFORTABLE: Soft, lightweight facepiece and easy-to-adjust head straps
  • CONNECTION TYPE: Bayonet
  • REMOVABLE FILTERS: Can be replaced with NIOSH approved 3M filters and cartridges


Assembly includes Half Facepiece Respirator and Particulate Filter 2091 P102 P100 Half facepiece design combines comfort and convenience Remarkably comfortable, soft, lightweight facepiece and easy-to-adjust head straps Removable filters can be replaced with NIOSH approved 3M filters and cartridges NIOSH approved for environments containing certain oil and non-oil based particles


Aaron C Reskew
2025-09-06 19:14:13
It works, it fits, and it's comfortable. I previously had the medium size which kinda-sorta fit but I found I was constantly fiddling with it to make sure I maintained a good seal. With this one I put it on and forget about it.There is another type of mask that has a "drop down" feature, which means when you undo the clasps at the back the mask drops down off your face. That's handy if you want to pop it off for a minute to talk/eat/drink etc but it's not a big deal to lift this one out of the way if you need to.Some reviews commented on it coming without the filters. Mine came with the filters, as expected. Not sure if some people are ordering from third party sellers or what. I'm still using the filters that came with my previous respirator and they fit just fine.I wore my respirator for several hours while pulling down an elderly lath-and-plaster wall and some 1930s drywall. Previously I'd used a paper dust mask for that kind of work and found I got enough dust in my nose to be annoying. After some hours of pulling stuff down and cleaning up dust (including getting quite close to piles of dust as I swept them into a dustpan, prior to sucking up the remainder in a shop vac), virtually nothing got through. The very small amount that got through suggested I didn't have the mask fitted quite perfectly, but obviously it was pretty close.For my purposes I'm not hugely bothered if I don't have a perfect seal - my usage is more for building dust rather than specifically hazardous material. That said, this thing feels like it would stand up just fine if I was removing nastier material than plaster dust.
JRNH
2025-08-17 14:32:11
Fits great, good seal.Easy to breath, does not fog up my safety glasses.Reasonably comfortable after wearing for hours at a stretch (note: I did not wear this over 75-deg weather, that was fine).The product shipped without the filters despite the 3M bag showing that this would have filters in that bag (as described). A very simple call with Amazon fixed this as they shipped me filters which I had two-days later. (I bought the Gas Mask along with a spare set of filters so I was able to use this immediately - the filters Amazon shipped me are now my back-up set so other than a 5-minute phone call this issue had little impact to me.)Filter life: I have been using this while using a leaf vacuum in the fall (which kicks up a lot of dust, dirt, and fine bits of leaves) so far for about 20-hours, the filters show some sign of use (as one would hope) but have no indication that they are close to being at end of life ... ie, I would expect to be able to use the same filters for probably at least 50-hours of this type of work.
Molly1
2025-08-06 15:35:23
I had to go into a moldy and dusty old house to clear out for sale. This mask did the trick as I have very reactive lungs. I would suggest the filters on this often. If you are in the same situation works great and made me feel safe. I also literally could not smell the mold at all. This mask is top quality and a real lifesaver. It is also lightweight.
Fel
2025-07-27 15:55:22
Works great, so much better seal than the cloth N95s. Not exactly comfortable but not bad, I get used to it. Can't believe how reasonably priced it is. Includes the two pink filters, which have a 5-year shelf life (though will need to be replaced sooner if used a lot and they deteriorate). Thorough instructions for wearing, testing seal, checking for deterioration, etc. Should've bought one of these long ago. Bought just recently to deal with Bay Area smoke from Napa/Santa Rosa fires.OK, a few days of use later, I will add a couple of caveats. First, it has a very noticeable rubber smell. I get used to it more or less, but it's not real pleasant. Also, I am constantly readjusting it around my nose due to discomfort and even a little pain on the bridge of my nose. I guess this goes with getting a great seal, which is of prime importance, and it may not happen with other faces/noses, I don't know. Still, I will maintain my 5-star rating, as it really works great for the intended purpose. The difference in how my lungs and throat feel on these bad-air days when I wear it vs when I don't is substantial.
Ryan
2025-07-18 14:30:07
Perfectly adequate respirator for welding. Like many respirators, it can be a little snug under the hood, but this one fits better than most and the filters are pillow soft allowing the hood to be closed tighter without damage to the inner lens. It works better with an auto darkening hood, as you can pull it tighter manually before striking your arc, but it works with passive shade helmets as well if you aren't welding to seriously out of position as I sometimes had difficulty getting my hood closed in overhead or positions. I sincerely wish there were more respirators made for welding, but this is about the best that I could find, and should do the trick as long as the levels of fumes in your area do not exceed 10 x's the acceptable breathing level. Works good at keeping grinding dust as well, which most welders deal with quite frequently. You seriously don't want to be breathing that stuff in, especially any stainless or high alloy metals. I was not paid for this review.
Hobbiest
2025-06-25 12:53:02
Package did not include respirator only filters. Amazing how someone lets that happen. The bag says 1 respirator and 2 filters but no respirator. Poot quality control. Now have had to send in request for actual product I paid for and hopefully wont get another empty package.Update: corrected in less than 24 hours great service package arrived as advertised and i will order more for sure. Great fix.
Rachel
2025-01-18 14:54:59
I am quite pleased with this mask. Im about 6foot 200lbs so bought a size large, and it fits me well. Much more comfortably than the medium. I called 3M's support and they confirmed this mask will fit any filters sold by 3M. I bought from Amazon, and the mask came shipped with a pair of 3M 2091 particle filters, perfect for the home renovations i am doing.
Oneau
2025-01-15 09:55:50
I use this for working in a fabrication shop. Works great, the fitment takes awhile to adjust but once you get it dialed in the mask is comfortable to wear all day.
Dan in Canada
2025-01-07 16:48:34
Inexpensive and reasonably comfortable. The build quality isn't amazing, but the main mask is soft and seals well. I think this is a great option for people who want a good respirator for the occasional project. It's almost infinitely better than those disposable things (about 150x better than a P95 mask) and still inexpensive. If you need this for daily use at work or something though, I'd recommend spending a bit more on a sturdier model.
Johnathan Chu
2024-12-05 13:19:27
I don't know why I keep seeing people hating on this because they didn't receive something.....Shipping errors happen, and I bet they took care of it once you complained!Anyhow....Shipment arrived, the one thing I would say is I would have preferred a bit more protection in the packaging. I did check all the seals and all, everything works fine, but looking at how it was packaged (just in a plastic bag) def left me a little concerned.Large fits me perfectly, and Medium fits my 10 year old daughter. I can't imagine how small a small is, but medium fits kids fine.All in all, happy with the product. happy with the shipping, unhappy with the packaging. 4 out of 5!
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