Fantail Polarized Glass 580 SunglassesAlways 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. Glass provides the best clarity in material Encapsulated mirrors (between layers of glass) are scratch proof 20% thinner and 22% lighter