I purchased one of these earlier in the week and used it for the first time today. Not cheap, neither is lung disease. Oh my goodness, this thing is amazing. Very comfortable and absolutely no dust got inside. Gentle air circulating through the helmet is very pleasant. My wife had pointed out that I seemed to be getting a sore throat often after woodworking. My old respirator would fog my glasses so I'd end up just throw it aside. I am used to wearing a hard hat so this Trend Airshield doesn't bother me a bit. If you're on the fence about getting one, I think you'll be happy with one, once you get past the price.