Design/Technology: 9 fixed vents for regular airflow Plush lining for comfortable, warm feel Removable Snapfit SL2 ear pads for warmth with Aleck™ audio system compatibility Goggle strap lock removable for streamlined construction when goggles are also worn Self-adjusting lifestyle fit system that flexes to your head shape for optimal comfort AirEvac™ ventilation system to accommodate Smith® goggles to minimize fog Exterior shell fused with EPS foam for 1-piece design Contoured to better fit round heads Safety Features: Certain colorways available without MIPS® system Certification: ASTM F 2040, CE EN 1077:2007 CLASS B