Originally Posted by
livedarklions
Oh, you with your silly breathing fetish.
There really does have to be a point where the increased risk of heat exhaustion/heat stroke outweighs the possible safety benefit of more coverage.
It leads to the spectacle (at least around here) of people biking uphill on a relatively dangerous road, having removed their helmets because of overheating, to get to the downhill trails (where presumably they will use the helmets).