580P C-Mate Get the benefit of readers and sunglasses all in one. Equipped with our patented C-Mate technology, these Costa Brine 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 reader sunglasses make for a seamless day spent discovering a new stretch of water, casting and getting one on the line.
