Costa Del Mar Fathom polarized sunglasses are made for hard-core saltwater junkies. The Wave 580 lens is the first and only sun lens that blocks yellow light near 580 nanometers. What does that mean to you? Enhanced color discrimination, sharper contrast, and excellent definition. As with all Costa Del Mar lenses, Wave 580's are 100% polarized, block 100% of UV rays, and offer guaranteed performance for life. These co-injected cold-molded frames combine a perfect fit with top-of-the-line polarized lenses that provide maximum comfort and vision on the water. A true sportsman is always prepared, so keep an extra pair in your tackle box. Clothing & Accessories / Sunglasses