Set your sights on the horizon with the Costa 6S9131 Mainsail XL sunglasses. Crafted from durable nylon and propionate, these full-rim square frames deliver bold, modern style with micro side shields and hooding that minimize light leaks and enhance protection from the elements. Polarized grey mirrored lenses cut glare, sharpen contrast, and reduce reflections, offering superior clarity even in the brightest conditions. Featuring vented nose pads for reduced fogging and retainer-ready temple tips for added functionality, these Costa sunglasses are tailored for watermen who demand performance and versatility. Designed for those who see what's out there.