Paying tribute to a sleepy island about 8 miles south of Bimini - once the infamous hideout of Blackbeard the Pirate - Cat Cay is known as the birthplace of another legend: Bluefin tuna fishing. Costa Cat Cay performance sunglasses are a rugged and tough tool of any Angler looking for the best performing fishing sunglasses on the water. Polarized, mirrored options, 580 lenses and boasting a patented vented system, these Costa Men's fishing sunglasses are the choice of those who aim to make their own watery legend. Costa® believes in products with a purpose, and is proud to help support OCEARCH® in its mission to protect the sharks that keep our ocean ecosystems balanced. The OCEARCH® Collection helps fund research expeditions that generate critical.The lenses are made with Polycarbonate.