Leatt AllMtn 2.0 Helmet GraniteDescription Lightweight polymer shell in three sizes Sunglasses dock port for easy, secure storage. Fidlock magnetic closure system 360 Turbine Technology Reduced peak brain acceleration by up to 30% at impact speeds associated with concussion Reduces peak brain rotational acceleration by up to 40% Adjustable visor with breakaway function for rotational impact force reduction In molded impact foam for superior energy absorption Maximized ventilation