Costa Palapa 580G Sunglasses - Polarized Gunmetal Green Mir 580g, One Size Comfortable medium fit, Integral hinge, Corrosion-resistant Monel frame. Includes hard case, 100% UV light blockage for max protection. 100% polarization kills reflected glare and reduces eye strain. 100% polarization kills reflected glare and reduces eye strain. Plastic lenses are lightweight, impact- and scratch-resistant.