Ski goggles: The Bollé NEVADA have Italian double glazing which creates a thermal barrier while providing a better seal and optical quality. The wide field of vision ensures maximum peripheral view - The lenses have a metal layer for better contrast and reduced glare. The special patented P80™PLUS/CARBO GLAS technology decreases the risk of the lens getting scratched or foggy. Bollé downhill ski goggles are designed to be compatible with most helmets on the market. The patented air vents regulate air circulation inside the goggles to prevent lens fogging. FLOW-TECH™Venting technology;