The shell for LS2's Subverter motocross helmet is constructed from ultra lightweight Kinetic Polymer Alloy (KPA). It's lightweight; strong; and offers a little bit of flex as part of the energy management system. KPA tests as well as the best composite materials in the world and is the perfect material for a racing helmet. The shell features 35 separate ventilation ports; with channeled EPS (Expanded Polystyrene) to allow the maximum possible airflow keeping the rider cool in the heat of competition. A dual density EPS safety liner allows for state of the art energy absorption. Three different shell sizes are used to assure you a comfortable and great fitting helmet; the D-ring chin strap makes for a secure fit. The helmets comfort padding is covered with a breathable; hypoallergenic fabric that is removable and washable. The wide eyeport offers exceptional field of vision and accommodates most major brands of goggles. LS2's emergency release cheek pads are easy to remove in case of a fall. The helmets cheek pads are contour cut out of high quality foam using LS2's laser technology for all day riding comfort without hot spots. Kinetic Polymer Alloy construction offers ultra-light weight and high penetration resistance for increased safety. Three shell sizes; oval design ensure a perfect fit for most riders. Removable and washable comfort liner. Hypoallergenic fabrics are used in the liner to wick moisture and keep you cool. Multi-density EPS (Expanded Polystyrene) for added comfort and safety. Laser cut multi-density foam fits the curves of the riders face and provides a perfect fit with no hot spots. Features Dynamic Flow Through ventilation. Vented EPS and ventilation exhaust ports create a light flow of air to keep you cool and comfortable. Lightweight MX style shell with a wide eye port for added safety and vision. Emergency release cheek pad system. D-ring helmet strap buckle for a secure comfortable fit. Reinforced chin strap for added safety. Meets.