Costa Del Mar Cortez Sunglasses Made in US Case included Lenses are prescription ready (rx-able) Costa's most high tech lens - 580 glass provides superior clarity, scratch-proof, 100% uv protection and the best polarizing efficiency available. Case included Lenses are prescription ready (rx-able) Comfortable L fit. Built by hand and backed for life. Every pair of Costa Sunglasses includes a limited lifetime warranty. Costa's co-injected bio-based nylon frame material is both tough and durable, while offering a comfortable fit. Comfortable L fit. Built by hand and backed for life. Every pair of Costa Sunglasses includes a limited lifetime warranty.