3M Half Facepiece Reusable Respirator Assembly Kit 6391, Large, 1 Kit

Wonderful face mask. Filters very well & doesn’t leak & fog up glasses. Comfortable to wear for hours. Seems to last forever. I have one that’s over 25 years old & is good as new. Got another to get more filters & have a backup when I clean the inside of the other from runny nose or sneezing.

This mask is the best when it comes to mold exposure. I had mold in my last home, and when I found out it was time to move. I did massive research and it turned out that spores and their toxins are constantly in the air, and it gets worse when they are disturbed in any way. So while moving and cleaning up, I started using this mask. The amazing thing is that once I took it off, I could instantly smell moldy air. When i put it back on, the smell of mold disappeared. This type of mask, the 3M 6391 P100 Reusable Respirator Gas Mask, is the most useful against mold: 1) it's easy and ready to use right out of the box. 2) It really does work against mold and other airborn particles. 3) It fits very well, I had the large size. 4) it's very cost effective and you can actually get a brand new one for cheap, not just the filters. So I highly recommend it. It's the best value out there. It'll keep you safe from mold, toxins and dust particles. Thank you for reading this review! Good luck on your shopping journeys!

As a welder, I've used these for years. My old mask was wearing out and the straps have lost their elasticity. I recommend this product.

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.

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.

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.

I have bought these over the years and loved them. They fit so well. Well as all companies do they probably found another supplier to save some manufacturing dollars and these no longer fit at all. Huge gap on the sides of your face. They changed the chin area and it sticks out so far the mask can’t seat on the side of your face. Fortunately I crept my old mask which was suffering from worn out elastic straps. The good news was the straps from the new mask will fit the old mask perfectly. So I repurposed all the seals and straps from the new mask and I have a mask that works snd fits perfectly

I needed protection from ozone and the specifications for the 2097 filter mention this protection. There is however protection from many other small particles like metal or oil: "NIOSH approved for environments containing certain oil and non-oil based particles. 3M recommended for nuisance level organic vapor relief and for ozone protection up to 10X OSHA PEL. The 3M™ Particulate Filter 2097, P100, with Nuisance Level Organic Vapor Relief helps provide respiratory protection against exposure to lead, asbestos, cadmium, arsenic, and MDA. The filter is effective for concentrations up to 10 times the Permissible Exposure Limit (PEL) with half facepieces, or 50 times PEL with quantitatively fit tested full facepieces. This filter helps protect against a wide range of oil and non-oil based particulate contaminants. The filter also offers nuisance level odor relief from organic vapors that are below the PEL. Nuisance level refers to concentrations not exceeding OSHA PEL or other applicable government exposure limits, whichever is lower. Do not use for respiratory protection against organic vapors or in environments that are immediately dangerous to life or health (IDLH). The 2097 is commonly used for welding, brazing, torch cutting, metal pouring and soldering. Inventory needs and training requirements of safety equipment are reduced because this filter works for many different applications. This filter is commonly used in the following industries: agriculture, construction, general manufacturing, pharmaceuticals, primary metals. The filter works with a wide range of facepieces, including 3M™ Half and Full Facepieces 6000, 7000 and FF-400 Series. If used with 3M™ Adapter 502, the filter may also be used with 3M™ Respirator 5000 Series or 3M™ Cartridge 6000 Series. The filter is NIOSH (National Institute for Occupational Safety and Health) approved for environments containing certain oil and non-oil based particles. The filter has been assigned the color code “Magenta” in the NIOSH system. Passing NIOSH’s P-series test criteria, the 2097 P100 filter provides at least 99.97 percent filter efficiency against particles. Breathing hazardous particles can pose a risk to your health. NIOSH, a Federal government regulatory agency, has tested and approved the 3M™ Particulate Filter 2097 to help reduce exposure." The mask is somewhat uncomfortable but P100 suggests that it is better than N95.