The LS2 MX437 Fast Evo Solid MX Helmet is packed with features... Specifications Include: Shell KPA Shell Construction - Kinetic Polymer Alloy is a proprietary blend of polymer, space age thermoplastics and additional materials specifically formulated by LS2, KPA offers ultra-light weight and high penetration resistance, but with some flexibility for the ultimate in energy dispersion. This special formula meets both ECE 22.05 and DOT requirements. 3 Shells - XXS-XS-S \' M-L \' XL-XXL-3XL Long Oval Comfort Removable and Washable Liner - All LS2 helmets feature a fully removable and washable comfort liner so you can keep it as fresh as new. The anatomically correct cheek pads are cut using LS2\'s 3D Laser Technology for a perfect fit. LS2 use hypoallergenic technical fabrics that wick moisture to help keep you cool while you ride. Breathable Hypoallergenic Laser-Cut Foam - Multi-density foam is cut using LS2\'s 3D Laser Technology and formed to fit the curves of the rider\'s face for a perfect fit with no hot spots. Security Double D-Ring - A classic double D­ring buckle system for a secure fit. Slide the strap through both D­rings, and then wrap it over the first and through the second. Pull the strap until you have a snug fit that won\'t roll off. Emergency Release System - The emergency release system allows emergency responders to remove the cheek pads from the helmet, allowing extra space to remove the helmet with minimal movement of a fallen rider\'s head and neck. It\'s best that someone holds the helmet to keep it from moving as you remove the pads. Slide your finger into the red loop and pull carefully, slipping the pads free. Slide the cheek pads over the straps and pull them away from the helmet. Reinforced Chin Strap Metal Security Plate - This small metal triangle is an LS2 exclusive feature and reinforces the attachment of the chinstraps to the shell for extra strength. Multi-Density EPS Liner Ventilation Channeled Ports Multipe Top Vents Chin Vent Exhaust Port Weight - 1150 +/- 50 gr ECE 22.05 Certified UV Resistant Coating Available in sizes up to 3XL ACU Gold Approved