PM2.5 MERV 16 Filter Material USA Made Cut to Fit Any Size 16"x24" for Face Covering, Air Purifier, HVAC

I'm writing this for informational purposes. The quality of the material is hi. However the practicality of the material is very low for the average household as many people go looking for this material to make personal filters for their air vents as many apartment complexes have shared air and many people smoke cigarettes, marijuana and other things which none of us want to breathe . However, the level 16 rating means that it restricts air flow more than other filters. However the filter quality is very very high. There is in fact a nano layer which I have found via dissection, and then a more coarse layer that is designed for only stopping larger particles. This is a two layer sheet that is bound together via interweaving. It's actually a very good product. However most people here believe that it's supposed to be breathable as a lower level eight or five.

It arrived a week ahead of the shipping estimate and is clearly a high quality product. It's a little hard to get the rounded curve out of it, since it was rolled up. Otherwise it's exactly as advertised.

Excellent for cutting to size filters to decrease/eliminate fine dust being blown into the air near the vacuum.This is actually an issue with most vacuums; not good for breathing or maintaining a good indoor air quality. Specially for stick vacuums (in my case featherlight model by Bissell) that offer the advantage of reusable affordable filters, compact size and excellent functionality, what they come with do not filter everything or better said do not offer sealed vacuuming. The exhaust air ejects some of the fine particles out with it.By layering a cut to size filter from this sheet behind the existing filter, you literally eliminate most if not all if it. In this way, I was happy to keep my existing vacuums without having to invest in bigger, bulkier, expensive units that require frequent filter change to offer sealed vacuuming. I confirmed this using an air quality detector that particles do not get into the air from the exhaust air vs. without.The only complaint is that the sheet has a back and front side. When cutting, they can come apart at least partially. It still holds together fine.

Not the most flexible of stuff. Seems to work well.

I'm using this fabric with the Adrenaline face mask from Outdoor Research (another excellent product, BTW). Duplicated the size and shape of the Adrenaline filter and it slips into place perfectly. However, unlike the stock Adrenaline filter, this fabric holds its shape when the mask is lowered for drink, food, facial ID, etc. Sewn so the fuzzy side is towards the face, it absorbs the exhaled moisture nicely. (I suspect if it were placed the other way, moisture would accumulate on the smooth side and drip down into the chin area of the mask.) A good choice with the Adrenaline mask since the MERV rating of this fabric being high, a tightly-fitting mask is almost mandatory else air will pass at the periphery of a poorly-fitting one. We got fifteen filters cut from one roll (and could have gotten more if we had been more careful). When these run out, will definitely get more fabric.