Well any thing that goes over your head it going to get soaked with sweat, under armor is spouse to wick sweat away. If you want to protect your teeth you might want to try a mouth guard(i gust got one, haven't tried it out tho, just and idea). Hoped this helped I was having the same problem.
I'm about to move and I found an airsoft place but you can only use fully sealed goggles/pb masks.(I'm not going back to a pb mask). I found 2 different styles of oakleys. And I'm going to get the custom versions, so the colors will be different. I need them to stop a 400fps bb at point blank range. Thanks