Serengeti Vittoria Sunglasses The Serengeti Cosmopolitan collection combines the best of both worlds sleek stylish frames with the state of the art lens technology, making sure your eyes are always cared for in any light. Made from only the finest materials in the world, Serengeti's glass lenses provide unsurpassed visual acuity. And because the advanced technology is molecularly engineered into the glass itself, it does not wear out or wear off. In an age of disposables, our lenses can last a lifetime. Fits MediumLarge Lens Drivers Polarized With its versatile brown lens, the Drivers Polarized lens performs under cloudy and harsh light conditions. Plus, you get the added protection of the Serengeti polarizing technology. 18% transmittance lightened lens 10% transmittance darkened lens. • Drivers The Drivers brown colored lens is ideal for driving, because it adjusts to the changing light conditions that are inevitably encountered on the road. 24% transmittance lightened lens 9% transmittance darkened lens