Originally Posted by dutret
Then you need to get a better helmet or ride faster yourself. At reasonable speed a good helmet will funnel enough air over your head that heat won't be an issue. The exception to this is of course mtbing and occasionally really steep road climbs where you are moving 5mph for an extended period.
Shhh....don't let Mr. Helmet hear you talk like that. He gets jealous.
But I can pretty much guarantee there isn't a helmet out there that won't get sweaty on my head. I'm a sweaty boy. Now if I could just harness that wasted heat into useful power...