SCHAMPA’s CoolSkin Balaclava helps separate your Head from the Gunk in your helmet. After any use of your helmet it begins to build up gunk inside it. For the same reason you use socks and change your socks after each ride you should be wearing a Balaclava for your head. Your helmet is a dark, hot, humid, nasty space and we all know the kinds of bacteria, and mold develops in these ideal spaces.