Im on 17# and this is the ONLY mask on the market that holds it. Best mask ever. 10/10
I have gone through a variety of mask. This is one of the better ones I have tried. It works well with my beard but I prefer cloth masks.
I used to be claustrophobic about full masks but they removed that strap on the forehead, makes it alot better!! that new air fit f20 has magnets on the head straps, made it so simple for my old friend from the factory line when he cleans it!!