Bolle Anaconda Sunglasses Plastic Anti-slip nose piece Anti-slip temples Extensive curvature provides for the widest field of vision as well as optimum Protection for the Eye area With a visible light transmission of 10 percent , they are ideal for sunny conditions 8 base. Improves awareness and offers better periphery vision 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