Deftly engineered for the demands of the modern day mountain biker, the 100% altis utilizes our proprietary smartshock suspended rotational system coupled with 14 ventilation ports resulting in a safe, breathable, and budget friendly trail helmet. Add in the adjustable visor for a cohesive storage of all 100% eyewear and goggles and you're ready to hit the trails. 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. Multi point adjustable visor designed for maximum vision and goggle stowage. Washable, moisture wicking anti microbial liner. Adjustable ratcheting fitment system. Nexus push release snap buckle.