Costa Del Mar PLAYA Sunglasses Black/White/Aqua Blue Mirror 580 Glass Plastic frame Plastic lens polarized Comfortable medium fit, Optical Spring 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. Built by hand and backed for life. Every pair of Costas include a lifetime warranty. Glass lenses have the greatest clarity and are scratch resistant.