With our new A1 helmet, we at Troy Lee Designs are proud to introduce our resounding return into the aggressive all-mountain half shell category. Features: Reinforced polycarbonate shell in-molded with the EPS liner extends down the sides and back of the head for maximum protection and durability MIPS protection system, reduces rotational forces to the head 8 pressurized intake passages draw in cool air for maximum ventilation 8 rear vacuum vortex outlets help exhaust and draw heat from head Triple position adjustable retention system allows customized fit for various eyewear, head shape and riding styles Single piece, ultra plush, removable and washable comfort liner made of anti-microbial moisture wicking material for a dry, comfortable feel Full spectrum adjustable moto inspired visor with anodized aluminum hardware Race inspired styling