Serengeti Wire-Flex Sunglasses Baae Curve: 8 Rx; Temple Length: 130mm; Lense Size: 63 x 38.4 x 63.9 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. With its versatile brown lens, the Drivers Polarized lens peforms under cloudy and harsh light conditions. Plus, you get the added protection of the Serengeti polarizing technology. 18% transmittance lightened lens/10% transmittance darkened lens.