Smith Optics Spherical Series are the top-of-the-line ski goggles! The Smith Spherical Ski Goggles come loaded with deluxe features, like dual-layer Driwix face foam to give the goggles a customized, comfortable fit. Smith Spherical Goggles feature a Carbonic-X outer lens. Each Smith goggle lens is individually molded to offer optimum scratch and impact resistance, increased visual acuity and enhanced contrast sensitivity. The inner lens is impregnated with the Smith Optics Fog-X lens treatment for increased anti-fog performance. The Carbonic-X lens meets Class 1 optical standards as well as ANSI Z80.3 standards. There is simply no better lens. The Smith Spherical Series features advanced airflow technology, with each goggle offering the Vaporator thermal lens bonding technology. Many models of Smith Spherical Goggle also offer the Regulator adjustable air flow vents in the goggle lens. Any way you slice it, Smith Spherical Goggles are the top choice for ski goggles!