This component is an exact replica of the early breath deflectors in the original Vents mask. The idea was to catch and channel your hot breath in the mouth guard and out the ports in the side. In dry Colorado weather, it's hard to see a difference, but test results from a ski trip says that it does make a difference... For the guy who needs that extra 10%. 10.
Last edited by alpha434; 06-25-2011 at 03:13 AM.