Made for hard-charging trail riders, Bontrager's Lithos gives you great protective coverage in a lightweight package. Huge vents all over offer up great ventilation regardless of speed, a much-needed detail for those long climbs and slower techy sections. It features in-molded construction with internal reinforcements for top-notch safety. It comes in 3 different sizes, and when you combine that with the LockDown side straps and the Micro-Manager Fit System that you can adjust with 1 hand, you've got a custom fit that is tailor-made just for you. The removable visor is adjustable up to 10 degrees too, a nice touch.