Providing natural shade from the fierce sun, and with a frame made with resin from the castor plant, it's obvious why Costa Del Mar gave the Copra Polarized Costa 580 Polycarbonate Lens Sunglasses their island-inspired name. The polarized Costa 580 polycarbonate lenses send your eyes on vacation by blocking out harsh UV light, killing reflected glare, and significantly reducing eye strain to let you truly enjoy your day in the sun. The heavy-duty TR-90 frame material is crafted into a timeless silhouette that looks great in any outdoor setting, and the included hard case provides safe storage when your day of adventuring comes to an end. Proposition 65 Warning for California Consumers: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.