Low profile and setup with the new intake port vent system the chapter is the new archetype for all mountain ridingthe deepest channels giro have ever cut into a snow helmet pump air over your head to keep you cool and comfortablein form fit system makes it easy to dial in a custom fit in secondsin mould construction fuses a tough polycarbonate outer shell with the helmets impact absorbing foam liner for extra durability without excess weightthe interior subliner allows you to customise your pad