Bolle Spiral Sunglasses, TNS Gun, Shiny Black/Green Anti-slip nose piece Anti-slip temples Frame venting System Wrapped temples Optical class 1 with 100 percent UV Protection Our polarized lenses align light rays from the sun, giving you a crystal clear view at all times The only prescription program which ensures optimum precision, comfort and frame balance for sports sunglasses Our polycarbonate lenses are 20 times more impact resistant than glass and three times lighter Precision frame venting technology helps prevent moisture build up no matter what the weather