Buy Costa sunglasses with confidence from BeachToBlvd, an authorized dealer. Always ready to hit the flats or hook a deep-sea behemoth, the Costa Fantail sunglasses are the smaller but no less mighty kin of the Blackfin. The best polarized sunglasses on the water, these men's performance sport fishing sunglasses with mirrored options are polarized, co-molded and are perfect for any Angler.