Design/Technology: Exterior shell fused with EPS foam for 1-piece construction Dial to quickly adjust fit to your needs Built to integrate Smith® goggles for optimal comfort and ventilation AirEvac™ ventilation system integrates with Smith® goggles Fixed vents for regular airflow Plush lining for warm feel Removable goggle strap lock to streamline shell when goggles worn beneath helmet Safety Features: Certification: ASTM F 2040, CE EN 1077: 2007 Class B