Learn more about Costa Sunglasses Engineered for spotting fish, Costas Tuna Alley Polarized Sunglasses lenses are crafted with an eight-base lens curvature for optimum peripheral vision.The 580 advantage is available in lightweight, impact-resistant polycarbonate (580P)that is scratch-resistant with superior clarity. Wraparound fit kills reflected glare, reduces eye strain and blocks out 100% of UV light. Front frame vents alleviate lens fogging. Nonslip interior lining stays comfortable all day. Heavy-duty integral hinges hold the sunglasses tight to your face. Lightweight, durable co-injected nylon frame. Includes a hard case. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Polarized.