I used the Zero mask in sub-freezing temperatures, and it worked well. There was a little bit of fogging on just the lower edge of the lens, but nothing that actually affected my vision. I’m confident that it would be fog-free in better conditions. I like how it comes with a case, visor, and extra lens. It’s a really good value for the price, especially when it’s on sale. I have one thing that I don’t like about it: the orange parts. Not very woodsball-friendly, but also not a dealbreaker for me...