Unigear OTG Ski Goggles, Over Glasses Snowboard Snow Cylindrical Anti-Fog Goggles for Men & Women with Interchangeable Lens and 100% UV400 Protection (Black Lens (VLT 17%)) Anti-fog OTG ski goggles for men & women with spherical magnetic lens Designed to be worn over glasses. With variety of lens colors and interchangeable lens system, swap for day/night & different weather conditions. Perfect snow goggles for skiing, snowboarding, ATV, snowmobile and snocross High Performance Anti-fog and 100% UV400 Protection  Advanced double-layer lens with anti-fog coating protect against fogging and block strong sunlight in bright conditions. Anti-glare modifications have also been made to the cylindrical goggles Two-way Ventilation System with Frameless Design  The smooth air-flow system on goggles brings fresh air and exhausts moisture quickly and effectively. The big, cylindrical, frameless lens offers an excellent optical clarity without deformation OTG and Helmet Compatibility  Unigear ski goggles are designed to allow you to wear your prescription eyeglasses under the goggles. The adjustable long strap fits different helmet, facemask and head size very well. One size fit most people Everything You Need: 1 x Unigear Ski Goggles, 1 x Portable box, 1 x Pouch for carrying and cleaning, 1 x User Guide, lifetime warranty guarantee and 100% customer satisfaction VLT 0-8% - Suitable for sunny day with strong sunlight VLT 9-18% - Suitable for sunny to partially cloudy day VLT 19-42% - Suitable for cloudyfoggy day VLT 43-79% - Suitable for low light conditions VLT 80-99% - Suitable for dark and poor light Wipe the lens only with soft tissue or the pouch come with. Do not wipe the inner lens which will invalidate anti-fog function. Leave your goggles to dry in a well-ventilated place after use. Detachable Lens System for Quick Lens Changing Anti-Fog Coating featured on the lens UV400 Protection and Anti-glare for Full Eyes Protection Lens Size: 8<span class="a-text-bold">.</span>66inch*6.88inch Lens Material: PC + UV Frame Material: TPU Strap Length: Adjustable from 34 cm to 60 cm