So I'm a person who sweats A LOT. I've went airsofting twice with this masks and it has not fogged on me, and that's what I was lookingfor in a mask so I'm pleased. Doesn't squeeze your head. Hat size 7 ¼ so you have an idea head size. So far I'm really please. I'll put another review when I go paintballing with it. But for now I'm liking the mask.