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

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.

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.

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.

I use this a lot. I have an older house with blown in cellulose insulation in the attic, might have glass fibers in it as well. I made the mistake of going up in the attic without a filter mask once and spent a full day with irritated lungs and windpipe coughing that stuff up. Now I wear this mask every time and never have any issues. It's very hot in the attic, I never feel uncomfortable with this mask on.I also use it for yard work, it is dry and dusty where I live, so when I run the blower or mower a lot of dust is kicked up. Finally, I'm a wood worker and run sawdust generating tools in the enclosed garage a lot. I would never do that work without this on.It fits snugly and comfortably to my face, is easy to attach and take off with gloves on and the replacement filters are cheap. Filters have huge surface area so I have not yet clogged a set and it is very easy to breathe in.

Comfortable and reliable. It’s not as comfortable as it could be, but for 20$ it’s very solid. Fits my welding hood perfectly and no weird silicone smells. The design is pretty versatile for different sized heads.

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.