Serengeti Eyewear style Fontana is a technologically advanced and superbly crafted nylon wayfarer frame. The Rx-able Fontana features a saddle nose bridge for perfect fit. Featured on the temples and on the right lens is the Serengeti logo. Serengeti Eyewear has scratch/impact resistant photochromic glass lenses that adjust to light changes in the environment and provide 100% UVA/UVB protection. Size: 58-15-130 mm