mine has never fogged up. its been used in the summer and a variety of skiing days.
i think you should be fine, but if it does fog, just leave it in a warm place opend on so it can vent the moisture.
I MAKE CUSTOM DIECUTS, LOTS OF COLOURS TO CHOOSE FROM AND CAN MAKE ANY SIZE YOU WANT. PM ME FOR PRICING ETC.
I didn't fix your brakes, but i made your bell louder - e flip