Serengeti Sunglasses Cetera 7340 Dark Tortoise Brown Drivers Polarized Photochromic Lacoste these sunglasses not only enhance changing lenses to match these sunglasses not only enhance visual clarity and reduce glare but also provide robust UV protection while the brown vintage gradient black lenses offer a seamless blend of fashion and function 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