This low-profile snow helmet features an ultralight shell construction and zonal Koroyd® coverage to better absorb impacts. AirEvac™ ventilation regulates your temperature with ease, so you can keep skiing or boarding all day long. This version features Multi Directional Impact Protection System, or MIPS, which uses slip-plane technology inside the helmet to reduce rotational forces that can occur in certain impact situations. Dialed-up comfort level features a microadjustable BOA® 360 Fit System that adapts to your whole head. A sweat-wicking, odor-fighting liner keeps you warm, while a front and rear adjustable 24-vent design lets you regulate airflow as needed. Complies with ASTM F 2040 and/or CE EN 1077 alpine ski and snowboard helmet safety standards Zonal Koroyd coverage provides lightweight, energy-absorbing impact protection MIPS Brain Protection System reduces rotational forces caused by angled impacts to the head AirEvac ventilation system integrates with Smith goggles (sold separately) for fog-free lenses BOA 360 Fit System provides on-the-go micro-adjustability with the turn of a dial Removable ear pads for form-fitting comfort Dual regulator climate control offers easy, one-handed front and rear vent adjustment Ionic+™ antimicrobial lining offers sweat-activated odor control Compatible with Aleck™ audio systems Polystyrene/polycarbonate/ABS Imported