Serengeti Nuvola PolarMax Sunglasses brings a full measure of quality, clarity, substance and style that seems to defy gravity. Serengeti patented polycarbonate lenses with photochromatic properties and superior polarization are of the utmost in eye protection. Serengeti PolarMax Lenses live up to the high optical standard of Serengeti Sunglasses lenses. Specifications for Serengeti Nuvola Sunglass with Serengeti Polar Max lenses: Base Curve: 8 Temple Length: 134mm Lens Size: 60 x 36 x 64mm, DBL 14mm Frame Colors: Shiny Brown (6864) Shiny black frame (6865) Lenses: Serengeti PolarMax Drivers (6864) Serengeti PolarMax CPG (6865) Features of Serengeti Nuvola PolarMax Sunglasses: • Polycarbonate Lenses with Photochromatic Properties and Polarization • Lenses are Ground and Polished to be optically perfect • Lenses deliver Spectral Control • Virtually 100% UVB and UVA Protection • AR Coating on the Backside of the Lens • Ultra Lightweight Package Contents: • Serengeti Nuvola PolarMax Sunglasses Style: Classic Type: Driving Sunglasses Gender: Unisex Age: Adult Frame Color: Black Lens Color: Brown/Amber Gradient Color Mapping: Brown/Amber Gradient Frame Material: Plastic