Originally Posted by DrIsotope

I don't wear my helmet on long climbs. I don't care what anyone thinks about it, either. If I have to go 6mph for 2 hours, the helmet isn't doing anything but making sweat. I keep a velcro strap in my bike bag, and hang the helmet from under the saddle.

When I get to the top and it's time to descend, I put the helmet back on.

I think the only takeaway from this thread is that if you're not gonna wear your helmet, don't hang it from the bars.