Serengeti PolarMax Nuvola Sunglasses, Black/Orange with Drivers Lens Base Curve: 8; Temple Length: 134 mm; Lens Size 60 x 34 x 64mm The Drivers brown-colored lens is ideal for driving, because it adjusts to the changing light conditions that are inevitably encountered on the road. 24% Transmittance lightened lens/9% transmittance darkend lens.