I have a costume mask with lenses through which I can see that they regularly fog up from breathing. I installed one of them in the mask, facing the lenses, and ran a cable through my suit to a phone charger sewn into my shirt. It worked PERFECTLY. A full day of clear vision at low speed and a light breeze at high speed. Very quiet. Even at high speed, the noise wasn't that noticeable and literally touched my head.
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