The Giro Sagen Snow Goggles are fully loaded with features. These goggles are equipped with an Expansion View Technology (EXV) that has been perfected at Giro's test lab in Scotts Valley, California, this groundbreaking new frame design serves up unparalleled peripheral vision. We started with a helmet-compatible goggle, and then shaved down the frame rim and added frameless zones to optimize a massive spherical lens focused on the best possible peripheral vision in a goggle. Engineered specifically for bespectacled skiers and snowboarders, goggles that are OTG (Over-The-Glasses) feature a finely crafted interior with extra volume to accommodate prescription frames comfortably. Increased air volume inside the goggle keeps your vision crisp, clear, and fog-free. Injection-molding a cylindrical lens helps refine optics and minimize distortion that can occur in thermo-formed cylindrical lenses. Every Giro goggle lens features an anti-fog coating to keep your vision and riding experience on point.