Birds Eyewear Icebird Ski Goggles with Silver Padded Frame Anti Fog Double Lens 100% UV Protection New 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. Comes with a micro-fiber storage bag. Has Revo Mirrored Lenses. Revo Mirrored lenses are a multi-layered titanium which provides a brilliant rainbow color.