I wholeheartedly agrre with Jim. I don't ski with glasses (contacts instead) but I bought a pair of the Turbo Goggles last year on a powder day. The only time I have ever had a fogging problem is on big powder days at Squaw (when it's still snowing). This problem was persistent until I bought these goggles. By far the very best $130 I have ever spent. They really are the difference betwen skiing pow all day and having to go in because I can't see!! JB.