The non polarized Serengeti Carrara 8453 is our updated and improved Medium Aviator. Serengeti took the classic Medium Aviator eye and improved the frame design adding a more contemporary temple with a hidden double flex spring hinge for a wider fit range. Added to Carrara is our new Polarized 555 Blue Mirror and Polarized Sedona lens with our unmatched Serengeti Ultra Light weight photochromic...(As others) and we have the ultimate classic. Fit: Medium Universal SPECIFICATIONS Polarized: No Photochromic: Yes Lens Color: Drivers Gradient (Amber) Lens Material: Light Weight Mineral Glass Frame: Satin Dark Gunmetal Base Curve: 6 Rx Temple Length: 135mm Lens Size: 59 x 52 x 67mm, DBL 13mm Fit: Medium Universal Frame Features: Monel Adjustable Nose Pads