Originally Posted by
cellery
If you want to maximize airflow over the noggin you should just shave it all off - helmet or not. Hair covering the entire dome is going to insulate far more than a helmet with its numerous vent holes.
This is silly. It takes a lot of hair to equal the insulation of the foam in a helmet, and hair has excellent venting - you have noticed that it is made up of strands, and not a solid mass?