Design/Technology: Exterior shell fused with EPS foam for 1-piece construction Dial to quickly adjust fit to your needs Built to integrate Smith(R) goggles for optimal comfort and ventilation AirEvac(TM) ventilation system integrates with Smith(R) goggles to minimize fog Fixed vents for regular airflow Plush lining for warm feel Removable goggle strap lock to streamline shell when goggles worn beneath helmet Safety Features: MIPS(R) Brain Protection System to reduce rotational force caused by angled impact to head Certification: ASTM F 2040, CE EN 1077: 2007 Class B