Costa Sunglasses, manufacturer of the first color-enhancing all-polarized glass sunglass lens, celebrates its 40th anniversary with the introduction of its most advanced frame to date, King Tide. In nature, a king tide requires the perfect alignment of the Earth and moon to create an exceptionally high tide and once-in-a-lifetime views and opportunities on the water. Like its namesake, Costa’s King Tide is designed to give you the ultimate advantage on the water.