Serengeti Sunglasses Cetera 7340 Dark Tortoise Brown Drivers Polarized Photochromic Contrast Mirror Gold Smith Sunglasses Lowdown 2 2MN Revo Blue Cat3 Smith Sunglasses Lowdown 2 2MN OZ Matte Havana Black Red Mirror Polarized feature refined lines and a slightly narrower fit define the lowdown 2 the CK22552S showcases lenses that offer exceptional sun protection Serengeti Sunglasses Cetera 7340 Dark Tortoise Brown Drivers Polarized Photochromic are a wrap around sporty sunglass with a lightweight durable construction and this model has the standard Drivers lens which is the cornerstone of the Serengeti lenses range with the superb optical performance and Spectral Control given by the superb manufacturing technology used by Serengeti to make these amazing photochromic lenses