All K2 lenses are double layer, spherical hard-coated lens, with industry leading anti-fog treatments, 100% UVA/B/C protection and Grade 1 certified optics. Lenses by ZEISS Carl Zeiss Vision – creators of the world’s most advanced optics bring incredible quality and experience to the optics of K2 Goggles. Each lens is made of a tough polycarbonate and treated with a hard-coating for superior performance and extreme scratch resistance. Ri-Pel® Ri-Pel® is a hydrophobic coating that is applied to each one of our ZEISS lens offerings. Designed to minimize scratching and smudging, expel residue from water, sweat, and fingerprints as well as enhance overall visibility. Ri-Pel offers the necessary lens protection to keep you on the hill all day long in any condition.