Troy Lee Designs Drone A1 Bike Sports BMX Helmet - Matte Yellow / X-Small/Small Reinforced polycarbonate shell in-molded with the EPS liner extends down the sides and back of the head for maximum durability 8 pressurized intake passages draw in cool air for maximum ventilation 8 rear vacuum vortex outlets help exhaust and draw heat from head 2015 Model DOT approved. Meets the FMVSS 218 Standard