FEATURES: ECE/DOT approved Adaptive Impact System (AIS) Polycarbonate alloy shell construction produces an extremely lightweight shell with excellent penetration resistance Impact Energy Cells made of RHEON, the Impact Energy Cells maximize absorption of low-speed linear and rotational impacts, reducing forces transmitted to the brain Multi-density Expanded Polystyrene (EPS) Technology provides a softer EPS.Critical zones have been fine tuned for a progressive response to low-speed and high-speed impacts. Expanded volume EPS means strategic areas of the helmet have more impact absorbing EPS, more suspension between your head and the ground EPS chin bar creates an additional element of impact mitigation Clavicle shell relief zone creates a soft zone filled with EPS to aid in reducing clavicle injuries Custom molded rubber trim with integrated nose guard Lightweight custom visor crews and stainless steel D-rings 1450 grams +/-50g (size MD/LG) Quick-Dry® comfort liner and quick release cheek pads are made of washable moisture-wicking, anti-microbial material True Functional Ventilation (TFV) - When in motion air is forced through multiple air intake vents, then passed through aligned vent channels in the EPS and exits out multilple rear exhaust vents Included soft fleece helmet bag Optional cold weather breath guard 73-0021XS 73-0021S 73-0021M 73-0021L 73-0021X 73-00212X