The Costa Del Mar® Ballast 580P Polarized Sunglasses were made for any voyager of the sea or land that are up for an adventure. These shades are constructed with a durable TR90 nylon and 100% polarized polycarbonate lenses. Polcarbonate lenses are impact-resistant and provide superior vision when you are discovering new waters. With a featherweight and classic design, you’ll be sure to stay comfortable and look cool while your sailing in your Costa Del Mar® Ballast Sunglasses.