Featuring a dual lens with an anti-fog treatment, the BollŽ Freeze Ski Goggles ensure perfect vision and comfort on the snow. They feature Flow-Tech¨ venting.Citrus lens increases contrast. Versatile lens, ideal for fairly sunny and overcast conditions. (VLT 26%).Vermillon¨ lens brings out contrasts and maximizes color definition. Wear in cloudy and fairly sunny conditions. (VLT 31%).Lenses block harmful UVA/UVB rays up to 400 nanometers..