Costa Harpoon Polarized Sunglasses - Shiny Black/ Green Mirror - Virtually indestructible, these nylon frames offer the perfect blend of durability, comfort and style. (It's always nice to look good holding a huge trophy fish.) For serious outdoor adventures, you need polarized sunglasses that will stand up to the elements. You just found them. Features Comfortable large fit. Optical spring hinge. Heavy-duty TR 90 nylon frame. Includes hard case. 100% UV light blockage for max protection. 100% polarization kills reflected glare and reduces eye strain. Built by hand and backed for life. Every pair of Costas include a lifetime warranty. Glass lenses have the greatest clarity and are scratch resistant.