Lens Type: Photochromic Ski goggles with Polarized Photochromic lenses that adapt their brightness to weather conditions. They are variables from CAT.1 to CAT.3. Thanks to their versatility, they will give you a very high performance both on sunny days and on days with very adverse weather conditions: fog, snow, rain, etc., X-POLAR lenses with Dual Layer AntiFog double layer system to prevent fogging with UV-400 protection, Internal ventilation system with anti-condensation for progressive air recirculation and guaranteeing the best possible visibility., Anti-Slip Strap for a perfect fixation of the goggles to the helmet., Frame made of thermoplastic polyurethane of maximum lightness., Microfiber sleeve and stickers included