About this item Fit: Adjustable dial fit for easy, on-the-go size adjustment. Integration: Designed for ultimate integration with Smith goggles for maximum comfort and venting. AirEvac ventilation system integrates with Smith goggles for fog-free lenses. Removable Snapfit SL2 ear pads add warmth and are audio-chip compatible. Aleck audio systems compatible. Protection: Lightweight in-moId construction fuses the exterior shell and EPS foam for a one-piece design that's lightweight and durable. Zonal Koroyd coverage for lightweight, energy-absorbing and ventilated impact protection. Regulator climate control allows easy, one-handed vent adjustment. Certification: ASTM F 2040, CE EN 1077:2007 CLASS B, CPSC, CE EN178. Included: Smith helmet bag.