Giro Montane Ski & Snowboard Helmet In-mold construction fuses a tough polycarbonate outer shell with the helmet's impact-absorbing foam liner. The fusion process allows for better ventilation systems, making In-mold helmets lighter and cooler than traditional helmets Roc Loc 5 Fit System allows you to easily custom tune the fit tension and the fore-aft tilt of the helmet in seconds using a single hand Super cool vents with thermostat control which allows you to custom tune airflow instatntly with a simple, low profile control button on the outside of the helmet Trip Clip helmet carry system Giro's proprietary X-Static XT2 anti-bacterial padding which is pure silver that gives X-Static the power to provide natural, permanent anti-odor and anitmicrobial protection that keeps your helmet feeling and smelling fresh