Salt Life Bal Harbour sunglasses feature Zeiss lenses and will protect your eyes with stylish looks and serious Salt Life attitude. Salt Life Bal Harbour sunglasses feature Grilamid TR90 frames for durability, 100% polarized CR39 lenses to reduce glare with 100% UVA / UVB protection. CR39 is considered the highest quality lens in the industry because it combines the optical clarity of glass with the durability of a thermally set material. The lens curvature is 8-base design. Salt Life Bal Harbour sunglasses have superior scratch and impact resistance and are perfect for the beach or the boat.