Originally Posted by HerrKaLeun

So I got those goggles and over 30°F they were fine with no fogging. but once I put my balaclava on they fogged up. so did my other glasses, and also my normal sunglasses. The glasses all were fine when I pulled the nose part of the balaclava down, but that gets cold and defeats the purpose of the balaclava. So the problem here don't seem to be the glasses, but the balaclava.

Google tells me no-fog balaclavas are a real thing. Problem is some of them are over $50-70 with mixed reviews regarding fogging. I figured what really is needed is to deflect the exhaled air away from the goggles.
I found this deflector for $13. You can get similar deflectors for $50....

Does anyone have experience with that and have a better solution? Reading through this thread makes me think the balaclava, and not the goggles, is responsible for the fogging. You can throw expensive goggles at the problem, but as long as you blow moist air over a cold surface, you will have condensation.

I know this is a goggle thread, but the goggles may not be the sole problem here.