Serengeti Sunglasses Riano Satin Black Frame Drivers Polarized Lens Model: 7431. Forget the notion that designer sun glasses are all about looks with Serengeti Riano you get premium fashion with cutting edge technology that only Serengeti can deliver. Serengeti Riano Sunglasses build upon traditional frames resulting in a progressive style that is attractive and comfortable. Riano Sunglasses are an example of how Serengeti Sport Classics Sunglasses keep pushing the boundaries.