Full-coverage frames provide extra protection on and around the water. Resourceful islanders know how to live sustainably, making use of every part of the plentiful coconut trees. Copra is dried, chopped coconut that is pressed for its valuable oil, and the broad palm leaves of the coconut trees provide cover from the fierce South Pacific sun. The full-coverage Copra Sunglasses from Costa provide natural shade as well. The frames are even made with resin from the castor plant. This bio-based resin offers a 70% reduction in emissions over petroleum-based resin, helping to reduce the overall carbon footprint. Wherever your water adventures take you, their 100% polarized, scratch-resistant 580P lenses will make the journey easier on your eyes. 580P Polycarbonate Lenses Polarized to eliminate reflective glare and reduce eye strain Lightweight, yet durable Impact resistant C-Wallscratch-resistant, smudge-free barrier 100% protection from UV light Absorbs harmful high-energy blue light (HEV) Cuts haze and blur for greater clarity Filters out harsh yellow light Enhances reds, greens and blues Sharp contrast with high definition Mirrored lenses deliver superior contrast and color while enhancing visual acuity TR-90 Nylon Frames Castor oil is used to make the bio-based plastic resin Bio-based resin offers a 70% reduction in emissions over petroleum-based resin Reduced overall carbon footprint Flexible, yet tough and durable Lightweight Hold their shape under harsh conditions Resistant to heat and cold Hydrolite hypoallergenic rubber nose pads prevent slipping Corrosion-resistant, stainless steel integral hinges keep their shape Key Features Comfortable medium fit 580P polycarbonate polarized lenses Heavy-duty TR-90 nylon frames Includes hard case and cleaning cloth Prescription ready Limited lifetime warranty