The Smith Prophecy Turbo Fan OTG Goggles are an excellent over-the-glasses style goggle that offer optimal clarity and a fog-free view. Built with a 2-Speed, Micro-Electronic Fan, this feature helps keep your goggles fog-free so that you can see clearly no matter the distance or the conditions. The Spherical Carbonic-X lens provides you with a large field of vision, scratch resistance and durability , and the TLT Lens Tech tapers the lens toward the sides eliminating distortion and increasing peripheral vision. To keep you comfortable, the 2-Layer DriWix Face Foam ensures a super comfortable fit and a strong thermal barrier to maximize fog prevention while also wicking the sweat and moisture away from your face. To enhance the OTG experience, the goggle's Floating Frame Membrane eliminates eyeglass temple pressure. The Smith Prophecy Turbo Fan OTG offers top-quality performance and comfort to skiers and snowboarders with glasses. Spherical Carbonic-X Lens, Available with Chromapop Lenses, Patented Regulator Adjustable Lens Ventilation, Fog-X Anti-Fog Inner Lens, TLT Lens Technology, QuickFit Strap Adjustment System with Clip Buckle, 2-Layer DriWix Face Foam, Helmet Compatible, ODS3 and Eyeglass Compatible, Floating Foam Membrane, Ultra-Wide, Silicone Backed Strap, Articulating Outrigger Positioning System, Medium/Large Fit, Includes Microfiber Goggle Bag, Category: Adult, OTG: Yes, Helmet Compatible: Yes, Spare Lens Included: No, Goggle Ventilation: Medium, Goggle Lens Change: Moderate, Frame Size: Medium/Large, Lens Shape: Spherical, Lens Type: Mirrored, Model Year: 2019, Product ID: 537340, Model Number: PR6CPGBK18, GTIN: 0715757549527