10 Packs Activated Carbon Filters Replacement Parts -5 Layers Protective Filters with 4 Exhaust Valves-Ship it from USA

The filters are excellent and fit perfectly. The valve nut didn't fit as tight as the original one I lost: note, I didn't use the valve face that came with this kit (see below). The original one would stay in place even without the filter, but these new ones in the original valve face fit loosely without the filter and will fall out. My fear is as the filter element compresses, the nut will fall out. The valve face was not an exact fit, which is the reason I didn't use it. It looked like the mask would have had to be damaged to use the new valve face.

I bought a mask at a local store, where they didn't have replacement filters. I didn't want to buy another similar mask. I was worry about buying filters that wasn't from the same source; the size like thickness and fitment. My mask also has vent holes, the filters fit perfectly better than the ones that came with the mask, even though by comparing them these filters were slightly smaller. The value of the amount and quality that I was looking for the value of the money. The sheerness or the objects purpose serves it well, they surround the area of my mouth and nose perfect. Being that they are a little smaller, it made the mask a little more snug on my face.

I bought these filter replacements. Kept changing the filter every couple of weeks because after a while the filter kept getting fuzzy and irritated my nose hairs. But I got slick and started installing the filter BACKWARDS with the gray side facing me instead of the white side. As a result, I have had the SAME filter on my mask for a whole year. I just toss the whole mask into the washer and wash the mask and filter together. No fuzzies after a whole year.

Had to cut 2 small slits along edge of valve holes of the liners to fit on the valve openings. It was soppose to fit the mask I also purchased on Amazon. But not a bad price. And slightly smaller liner and sloppily made. But works ok after after I reengineered it

Thicker than I thought they would be, so, definitely offering excellent protection in a mask.

I've ordered many filters for my respirator masks. While these were not an exact fit, they could be adjusted slightly because the respirator openings were in the same location as my mask. This company took the time to wrap each filter separately in a clear cellophane bag. I have ordered other filters that have been jammed into a small plastic bag, so the filters were rolled up at the edges, and not very sanitary seeming to me. Also, I always take an extra filter with me, and the individual wrapping makes this easier. The order included additional respirator valves which fit my mask perfectly. The filter kit was delivered as promised in just a few days.

Lots of masks without all the advertised layers going around. This one seems to have them all. Sturdier then I expected, not as flimsy as most filter inserts. Seems pretty good. Feel bad for cutting one open to check now. Seems to work well enough. I tried the one I cut open in my mask which still has that slight rubbery odor and could just barely smell it while the odor is strong without it. All the valves look good and have all the pieces that lock together and fit nice and snug into the filter itself.Looks like these filters are pretty good!

The supplied active carbon filters are more sturdy than the original paper filters supplied with the mask. The filter fit perfectly., although it takes a little effort to replace. This type of mask was not intended to be used for protection against infectious agents, since the air vents don’t impede the movement of air. This type of mask is intended for bicycle riding to protect against dust and pollution. The filters were delivered in short time.If this is what you are looking for, then this is a good choice.

Easy to use