Whether it’s hard-charging trails or hammering hills, the 100% ALTEC is the rider’s choice for an incredibly lightweight, ventilated and protective trail helmet. Featuring the Smartshock Rotational Protection, the ALTEC’s patented Smartshock elastomers begin defusing rotational crash energy immediately upon impact. Smartshock Rotational Protective System (14 point)Multi-Density EPS foam injection molded - Polycarbonate in size specific molds(XS/S, S/M and L/XL)Massive airflow with an impressive 15 ventilation ports - Expanded coverage while still lightweight - Integrated sunglass storage system - Multi-point adjustable visor designed for maximum vision and goggle stowage - Washable, moisture-wicking anti-microbial liner - Adjustable ratcheting fitment system - Fidlock SNAP magnetic buckle (NEW for 2021) ALTEC Sizes XS/S 50 – 55cm S/M 55 – 59cm L/XL 59 – 63cm