The 100% Altec Helmet is built to tear up the trails with its light weight and well-ventilated design. The advanced Smartshock Rotational Protective System (14 point) reduces energy transfer to the brain over a wide range of speed and impact types for maximum protection. The open face design is matched with 15 ventilation ports for airflow that ensures you won't overheat while you're riding. The 100% Altec is and advanced mountain bike helmet with cutting edge safety technology that doesn't compromise fit or comfort, giving you everything you ned for your next MTB helmet.