You can get some anti-fog stuff to treat the lenses with. I have some made by prestone that worked for me last year. Fortunately, I can see well enough without, so I kinda stopped wearing them this past season for bowhunting. I have problems with binoculars and rangefinders when wearing glasses, so to me its just easier to not wear them. Also, the Midwest Turkey Call Supply catalog has this headnet made by Buckwing that claims to be anti-fog because of a moisture absorbing liner. That may be worth checking out.