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.