ANTI-FOG COATING: Every Giro goggle lens features our anti-fog coating to keep your vision and riding experience on point. 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 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. 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 accommodate prescription frames comfortably. Increased air volume inside the goggle keeps your vision crisp, clear, and fog-free. HIGHLIGHTS: Medium-sized adult fit frame, Supervent face foam, Off-Road motorcycle certified. Bonus true sight polycarbonate CLEAR lens. STAY COOL AND FOCUSED ON THE TRAIL WITH THE TAZZ MOUNTAIN BIKE GOGGLE. WITH EXPANSION VIEW TECHNOLOGY, A POLYCARBONATE LENS, AND GREAT VENTILATION, YOU'LL BE ABLE TO HIT THE TRAILS WITH PRECISE VISION. The Tazz Mountain Bike Goggle utilizes a new, medium frame designed around our Expansion View Technology (EXV) to deliver a wide field of view with a more minimal footprint that's comfortable on a variety of face shapes and sizes. Crisp optics and a tear-off compatible polycarbonate lens work with a comfortable, stable fit and supervent foam.