FEATURES: ECE / DOT approved Adaptive Impact System (AIS) Tri-weave composite shell is comprised of carbon fiber, DuPont™ Kevlar® and fiberglass, producing a lightweight shell with superior 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 Conehead® Dual-density Expanded Polystyrene (EPS) Technology Expanded Polypropylene (EPP) chin bar creates an additional element of impact mitigation, and is used in the chin bar for its superior damage resistance, and energy absorbing properties Clavicle shell relief zone creates a soft zone filled with EPS and EPP to aid in reducing clavicle injuries Custom molded rubber trim with integrated nose guard Lightweight custom visor screws and stainless-steel D-rings 1340 grams +/-50g (size MD/LG), 2.9 pounds +/-0.11lb (size MD/LG) 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 multiple rear exhaust vents Included soft fleece helmet bag Optional cold weather breath guar 73-4311S 73-4311M 73-4311L 73-4311X 73-43112X