Costa Del Mar Copra Black Amber Sunglasses Plastic frame Plastic lens Polarized Lens width: Med Comfortable medium 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 includes a lifetime warranty. 100% polarization kills reflected glare and reduces eye strain, Built by hand and backed for life. Every pair of Costas includes a lifetime warranty. Glass lenses have the greatest clarity and are scratch-resistant.