Serengeti Savona Sunglasses (Shiny Black/Black Mosaic, Drivers) Cosmopolitan With an attention to detail usually reserved for the finest sports cars, our cosmopolitan sunglasses are just as admired for their beauty as they are for their technological superiority. Drivers Gradient The choice of pilots, or anyone who requires eye protection in addition to a crystal clear view, the Drivers Gradient lens provides exceptional clarity and confidence in all conditions. 24% transmittance lightened lens/9% transmittance darkened lens.