Premium Polarized 580 Lenses* Filtering reflective glare is essential for anyone on the water or outdoors. We sell only polarized sunglasses. ​ 100% UV Protection Your Costas absorb 100% of UV light, providing you the best in light management and protection. ​ Scratch Resistant and Durable The C-Wall coating provides extra scratch-resistance and a barrier that repels water, oil and sweat for easy cleaning. ​ Del Mar Sunglasses inspired by a life on the water, colors, patterns and textures that capture the spirit of the sea.