Northwolf Double Lense Anti-fog Ski Goggles Windproof UV400 Motorcycle Snowmobile Eyewear Sports Protective Safety Ski Glasses Double spherical lens.Lens in complete seal the dual lens with a glue,This chamber between the external temperature elimination features Adjustable headstrap with anti-skid,According to the size of head circumference,headstrap with anti-skid can be adjusted freely Anti-fog coated,The lens contain a super anti-fog fomula to keep your lense as clear as possible throughout the day Super wide view,Large size lense,big visual range for safety Unique notch, specifically designed for those who wear glasses, with glasses can be directly set in the ski glasses