Experience the pinnacle of style with Costa Mainsail XL sunglasses. These square-shaped shades feature a matte black frame that exudes sophistication and elegance. The solid blue mirror lenses provide both style and functionality, shielding your eyes from harmful UV rays while enhancing your overall look. Crafted from resilient materials, these sunglasses offer durability for years to come. Elevated by their modern design, these shades effortlessly blend traditional appeal with contemporary flair, making them an ideal choice for those who seek timeless styles paired with cutting-edge technology.