Anti-Fog Coating Every giro goggle lens features our anti-fog coating to keep your vision and riding experience on point. EVAK Vent Technology Found exclusively on VIVID goggles models, EVAK Vent Technology uses a new foam made from an ultra-durable, non-absorbent material. EVAK vents minimize the chance of fogging by releasing moisture while simultaneously creating a barrier from the elements. Expansion View (EXV) Technology 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 google, and then shaved down the frame rim and added frameless zones to optimize a massive spherical lens focused on the best posssible peripheral vision on a goggle. Injection-Molded Cylindrical Lenses Injection-molding a cylindrical lens helps define optics and minimize distortion that can occur in thermo-formed cylindrical lenses. OTG Friendly Engineered specifically for bespectacled skiers and snowboarders, goggles that are OTG (Over-The-Glasses) feature a finely crafted interior with extra volume to accomodate prescription frames comfortably. Increased air volume inside the goggle keeps your vision crisp, clear, and fog-free. Quick Change Lens System The Quick-Change Lens System uses self-locating magnets to assist in lightning-fast lens replacement. Four snap pins keep the lens securely locked in place. Seamless Compatibility For optimal performance of both helmets and goggles, Giro products are designed to work together, ensuring a seamless interface between helmet and goggle for an exceptional fit and dependable, worry-free function. Triple Layer Face Foam Triple Layer face foam with microfleece facing. VIVID Lens Technology with Optics by ZEISS VIVID is a patented lens technology - developed by Giro in partnership with ZEISS Optics - that improves the visual experience on snow by enhancing contract and definition. VIVID Lens Technology effectively manipulates blue light by letting in contrast enhancing blue light, while blocking harmful UV light. VIVID essentially filters out the haze and frees your eyes to spot your line and focus on enjoying your riding experience. Giro Ella + Vivid Smoke Goggles Womens