Originally Posted by
europa
Dunno mate. Our February regularly posts temperatures above 40 C (your 105 F) so I know the conditions. Yes, you do sweat like blazes but wearing a light bandana as I do helps keep things cool - I actually started wearing the bandana to fight skin cancer after noticing the strange, mottled sun burn on my scalp (yes, balding badly). Without a helmet, you still need sort of hat to protect yourself from heat stroke.
Richard
I've been working on a solution using a little bit of technology borrowed from NASA. I'll let you know if it works or not.