Troy Lee Designs A-1 MIPS Helmet Drone Black, XL/XXL Reinforced polycarbonate shell in-molded with the EPS liner extends down the sides and back of the head for maximum protection and durability with the MIPS brain protection system reduces rotational forces to the brain 8 pressurized intake passages draw in cool air for maximum ventilation and 8 rear vacuum vortex outlets help exhaust and draw heat from head Race-inspired styling with full spectrum adjustable moto inspired visor with anodized aluminum hardware Triple position adjustable retention system allows customized fit for various eyewear, head shape and riding styles with a single-piece, ultra plush, removable and washable comfort liner made of anti-microbial moisture-wicking material