Material: 50% Polycarbonate, 50% Plastics. Hybird polycarbonate & ABS shell construction. Complies to CE EN1077 standards. In-mould, lightweight construction with fused EPS foam lining for excellent impact protection. Low-profile, adjustable air vents for quick and easy temperature regulation. Removable goggle clip for keeping goggles in position whilst on the slope. Size adjustment dial system for easy helmet fitting. S/M: 54-58cm, L/XL: 58-62cm.