The B-7 sport sunglasses attack the elements while making a bold statement with their minimalist, stealth-inspired styling, fast-back temples, and wide-view lens. The sport-wrap protective Rx lens frame design offers impressive coverage and visibility while destroying harmful UVA and UVB sun rays, wind, and debris. Magnetic Interchange Lens System - Switch uses high-energy magnets embedded in the lens and frame to enable users to swap lenses quickly and easily as light conditions and activities change