Serengeti Granada Sunglasses The Serengeti Sport Collection are the kind of sunglasses that are always up for any adventure. They're lightweight and sleek without sacrificing a trace of our signature technology. 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.