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Are you wearing your goggles with a helmet that blocks the top vent?

No. In fact, sometimes the problem is that snow piles up on the top "roof" edge of the goggles where there's air-permeable foam, and that's when its worst because the melting snow up there gets even more humidity into the goggles.

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Do you have an extra $180 to drop?

If it really works and isn't a complete pain to use? Yes.
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Tony Fabris