Serengeti Wire-Flex Augusto Sunglasses, Shiny Gunmetal/Black Tannery with Polarized Lens Base Curve: 8 Rx; Temple Length: 130mm; Lens Size: 64 x 44 x 65.3 mm Wire-flex frames that bend to your face. The culmination of science and fashion come together in a blend of nickel, silver and stainless steel t provide a customized fit. This lens maximizes greens and yellow for high contrast and clarity and combats glare with premium polarizing technology. Ideal for all bright light conditions. 15% transmittance lightened lens/8% transmittance darken lens.