Protection Lightweight in-mold 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 Certification: ASTM F 2040, CE EN 1077:2007 CLASS B, CPSC, CE EN178 Fit / Integration Designed for ultimate integration with Smith goggles for maximum comfort and venting AirEvac™ ventilation system integrates with Smith goggles for fog-free lenses Adjustable dial fit for easy, on-the-go size adjustment Features Regulator climate control allows easy, one-handed vent adjustment 14 vents Removable Snapfit SL2 ear pads add warmth and are audio-chip compatible Aleck™ audio systems compatible