About Giro Blok MTB GoggleThe Blok mountain bike goggle gives you an uninterrupted field of view, exactly what you need when it comes to your eyewear. The Blok Mountain Bike Goggle utilizes a frame designed around Giro's Expansion View Technology (EXV) delivering an exceptional field of view with clear, sharp optics and a tear-off compatible polycarbonate lens. The fit is comfortable and stable too, so you can focus on your lines without distraction. Specifications Expansion View Technology (EXV) Anti-Fog Coating Extras: Bonus injected polycarbonate clear lens, 10-pack tear-offs Frame: Large-sized adult fit Face Foam: Supervent foam Certification: Off-road Motorcycle Certified Highlights: Double silicone-backed grip strap, Over-the-Glasses Technology (OTG)Roll-off and tear-off compatible Features Anti-Fog Coating: Every Giro goggle lens features their 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. Giro started with a helmet-compatible goggle, and then shaved down the frame rim and added frameless zones to optimise a massive spherical lens focused on the best possible peripheral vision in a goggle. OTG Friendly: Engineered specifically for bespectacled riders, 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. About Giro Founded in 1985 by Jim Gentes and headquartered in Santa Cruz, California, Giro is a manufacturer of helmets, goggles, apparel, shoes and softgoods for cycling and snow sports. Their products have been used to win multiple Olympic medals, world and national championships. They are a company set on evolving and pushing the boundaries, with a focus on design solutions, that enhance experience and performance.