Black Ski Goggles Double Lens Dual Vented Anti Fog New These Have the "Dvs" System or Dual Venting System; Upper and Lower Venting System to Maximize Air Circulation Inside the Goggles Which Helps Prevent Sweat Condensation and Fogging. Double lenses with Anti-Fog coating are polycarbonate, shatterproof and rated UV400 to block out the harmful ultraviolet light. These have the Birdz "DVS" system or dual venting system; Upper and lower venting system to maximize air circulation inside the goggles which helps prevent sweat condensation and fogging. Comfortable soft foam padding on the inside of the frames. They come with a soft micro-fiber bag to store them in. Has Amber Lenses.Amber lenses enhance contrast, enabling you to make out shapes, objects, and bumps in the snow more clearly because it blocks out the blue, or hazy, end of the color spectrum.These are also scratch resistant.Comfortable adjustable elastic headstrap with quick release buckle. Helmet compatible (most helmets).