Features: In-mould construction; Interior subliner; 8 Super Cool vents with Thermostat control; Intake Port vent system; Stack Vent; Compatible with all after market TuneUps systems; ASTM 2040 / CE EN1077 certification; Low profile and set up with our new Intake Port vent system; the chapter is the new architype for back country / all mountain riding. The deepest channels we have ever cut into a snow helmet pump air over your head to keep you cool and comfortable.