Spy Optic Flyer SunglassesSpy Optic's Flyer Sunglasses are made of virtually indestructible Grilamid® with interchangeable 8-base polycarbonate lenses. These stylish sunglasses feature Spy Optic's Happy Lens™, a colour and contrast enhancing lens technology that provides 100% UV protection whilst maximising the transmission of the sun's good rays Reduces Pressure & Eliminates FoggingThey also feature pin hinges, Hytrel™ nose pads and temple tips for a comfortable fit, even in rainy conditions and the Scoop® ventilation system, a patented airflow system that forces air through strategically placed vents on the sunglasses frame to reduce pressure and eliminate fogging Features:Grilamid® constructionFeature Happy Lens™Scoop® ventilation systemPin hingesInterchangeable 8-Base polycarbonate lensesHytrel™ rubber nose pads and temple tips100% UV protectionTechnologies:Scoop® Ventilation System: Goodbye fog. Spy’s patented Scoop® venting system eliminates lens fogging by promoting airflow behind the lens. The Scoop® system forces air through strategically placed vents of varying aperture on the frame to shut down fog. Your vision will thank you Happy Lens™: This is the only colour and contrast enhancing lens on the market that harnesses the beneficial aspects of long-wave blue light while offering protection from damaging short-wave blue light. Long-wave blue light helps you see better by enhancing colour, contrast, and clarity, making colours more vivid and surroundings more defined. Long-wave blue light helps you feel better by stimulating the brain’s production of serotonin to improve mood, increase alertness, and promote a healthy circadian rhythm Buy Spy Optic Accessories from Chain Reaction Cycles, the World's Largest Online Bike Store.