Many wear glasses, and in the winter this can be a real pain with exerting and sweating in the winter. A product I like to use is "Cat Crap" available at most major outfitters (often at the counter as an impulse buy...in a little red round pill box) ask for it by name, "Cat Crap" It has the consistency of soft chap stick, you smear a light coating on your glasses, goggles or what have you (I like clear safety glasses at night to keep blowing snow outta the eyes when blowing blizzard wild, thanks for that tip Kayak Karl) and buff or wipe off with lense ragg. This stuff really works works great to keep fogging at bay, and acts as a lense cleaner as well. Don't recall what I paid for it, few bucks, but at the rate I use it (a few times a season) it's damn near a decades supply.
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