Dr Zipe Guard Ski and Snowboard Goggles - ANTI Fog - Extra Long Adjustable Strap - Fits Most Helmets - Green Camo FOG FREE DUAL PANE LENS SYSTEM - Multicoated, Ventilated Interchangeable lens system was born from real-world testing in the most extreme conditions by professional ski and snowboarding athletes such as Anders Backe, Aaron Durogatti, and dozens more. LENS COLOR - Smoke with Silver Mirror ***FREE extra contrast lens for variable weather conditions is included BLOCK UVA AND UVB-RAYS - At high altitudes, the air is thinner and filters less ultraviolet (UV) rays. All Dr. Zipe lenses protect your eyes efficiently against harmful UVA and UVB-rays. UNBREAKABLE - Our proprietary Unbreakable Polycarbonate outer lens with Sealed Inner Lens makes for a uncompromising high performance snow goggle that leaves you focusing on your line, not your goggles. ACETATE INNER LENS - You want the best? Dr. Zipe goggles are uncompromising in quality and performance using proprietary Italian inner lens in Acetate with the best anti-fog coatings on the market. NO COMPROMISES