What's the best way to prevent fogging?

[im2fast4uguys]

A "fog city" visor insert is the only way to permanently stop the fogging you mention. You can buy them clear, various tints or for a little extra cash a photochromic version that changes with light conditions....i.e. its dark when bright/sunny..clear when dark.

Get one soon

 

[flyboy]

Try this it works...is what all the racers use when they are racing in the rain. I just ordered mine from this site.

http://helmetharbor.com/gear/respro/foggy_opening.htm

 

[winger40]

Check here. These things work great.
http://www.helmetharbor.com/gear/respro/foggy_operating.htm