Kaenon has developed ultra-polarized Clarke sunglasses to suit your active lifestyle while creating a relaxed, retro style which will never go out of style. SR-91 lenses combine the coveted trinity of glass clarity , lightweight construction and serious impact resistance essentially combining the best aspects of glass and polycarbonate lenses. Do you do trail running? , ride a bike around the city or go deep sea fishing Clarke Ultra sunglasses are always at your service.