Serengeti Gio Sunglasses, Shiny Black with Polarized Lens Base Curve: 8 Rx; Temple Length: 130mm/Spring Hinges; Lens Size: 60 x 39 x 64 mm The Sport Classic Frame give style and confidence. 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.