Costa Tuna Alley Readers Matte Black Blue Mirror C-MateGet the benefit of readers and sunglass all in one. Equipped with our patented C Mate technology, these Costa Tuna Alley reader sunglasses are the perfect balance of performance and function, whether it's spotting a fish, tying a hook or reading a map. Without any visible line separating the bifocal area, these performance fishing men's Angler reader sunglasses make for a seamless day spent uncovering a new stretch of water, casting and getting one on