The Gulf Shore Story...The white sands of Gulf Shores, Alabama are made almost entirely of grains of quartz washed down from the Appalachian Mountains thousands of years ago. These extra-large frames featuring rectangular lenses will be as enduring as those sands thanks to their timeless design. Being rimless makes these bio-based frames lightweight, leaving you unencumbered for an easy day on the coast. All Costa lenses have 100 percent UV blockage for maximum protection and 100 percent polarization to kill reflected glare. Our 580 technology goes beyond polarization to produce the clearest lenses on the planet. Costa Sunglasses are of high-end polarized sunglasses for use in water sports such as fishing, sailing, and surfing. They are specially designed to help offset the particular characteristics of light on water, Sunglasses built to perform, featuring our latest 580 lens technology. The clearest fishing sunglasses on the planet created by Costa Del Mar.