The ALTIS Gravel edition offers riders an ultra-lightweight helmet with an active cooling system equipped to provide a safe and comfortable fit that goes the distance on your gravel riding adventures. FEATURES Smartshock® Rotational Protective System 11 point. High Density EPS foam injection molded with polycarbonate in size specific molds XS/S S/M and L/XL. Massive airflow with an impressive 14 ventilation ports. Expanded coverage while still lightweight. Washable moisture-wicking anti-microbial liner. Adjustable ratcheting fitment system. Nexus push release snap-buckle.