Costa Brine Readers Polarized Sunglasses - Matte Black/Blue Mirror - Some people bleed saltwater. These are their sunglasses. These beauties are true high-performance equipment, using integral hinges, Hydrolite temples and co-injected, co-molding technology to deliver comfort and fit that lets you focus on dragging fish into the boat. Power: +2.0 Comfortable large fit. Integral hinge. Heavy-duty TR 90 nylon frame. Includes hard case. 100% UV light blockage for max protection. 100% polarization kills reflected glare and reduces eye strain. Built by hand and backed for life. Every pair of Costas include a lifetime warranty. Plastic lenses are lightweight, impact- and scratch-resistant. Glass lenses have the greatest clarity and are scratch resistant.