The new 100% Altis Gravel. Engineered for the demands of the modern-day mountain biker. Lightweight, breathable with class leading performance and safety all with a modest budget in mind. Smartshock Rotational Protective System (11 point) High-Density EPS foam injection and molded with polycarbonate. All sized in specific molds (XS/S, S/M, and L/XL) Massive airflow with an impressive 14 ventilation ports Expanded coverage while staying lightweight Washable, moisture-wicking anti-microbial liner Adjustable ratcheting fitment system Nexus push release snap-buckle