Serengeti Dante Sunglasses So comfortable you won't even know you're wearing them. The S shaped temple design adjusts to the contours of your head for ultimate comfort. 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.