Bell Pit Boss HelmetFrom the first time you put the Pit Boss helmet on, you can feel the difference. The ultra-light TriMatrix construction keeps weight to aminimum while still passing tough DOT standards. The Bell Pit Boss also features Bells innovative Speed Dial adjustable fit system whichprovides unmatched levels of comfort while drastically reducing the tendency for open face helmets to lift off of the head. And withadditional features like a removable neck curtain and drop down sunshield, the Pit Boss truly reigns supreme on the wide open road.Shell: Lightweight, TriMatrix composite shellKevlar/Carbon/Fiberglass blend 2 shell sizes MD: SM and MD helmets LG: LG and XL/2XL helmets Shield: Shield offers 100% UVA and UVB protection Internal Sun Shade offers on the fly protection from the sun Comfort: Innovative Speed Dial adjustable fit system Removable neck curtain for cold weather riding Convenient speaker pockets make it easy to set up the Pit Boss with communication devices Safety: DOT approved Five year warranty