Originally Posted by turbo1889

This is a very interesting discussion for me since I just purchased a 3/4 style minimum DOT protection standards lightweight motorcycle helmet (looks like a jet fighter pilot helmet complete with same style visor just without the oxygen mask underneath) specifically to use this winter for bicycling mainly to keep my head warm compared to a bike helmet (no vents).

I specifically was looking for a motorcycle helmet with a visor and full head wrap around with no vents for warmth. But I though a full face with a chin bar across the bottom would be more likely to fog up in the cold especially the ones with pads in the front chin bar so the bottom of the helmet was nearly sealed up. On a bike you sweat when pumping unlike a motorcycle and I was and to a certain extent even with an open chin 3/4 helmet concerned about fog up on the visor but we shall see.

Considering the physical activity and the resulting body heat and moisture produced on a pedal powered cycle that isn't there with a motorcycle I'm wondering how much of a fog up problem those of you using a full face helmet are having. Yes, I know most if not all of the good helmets are supposed to be non-fogging but experience has taught me that only means fog-resistant at least with my experience with other stuff that is supposedly non-fogging besides helmet visors (ski goggles, sunglasses, etc . . . )