Discover the Costa 6S9131 Mainsail XL, designed for those who chase horizons and demand performance on the water. These tortoise sunglasses for man feature square frames with bold lines and sharp angles, crafted from lightweight nylon and propionate for ultimate durability. Mirrored gold polarized lenses provide advanced glare reduction and enhanced contrast, offering crystal-clear vision even in challenging light conditions. Engineered with micro side shields, hooding, and vented nose pads, they deliver superior coverage, protection, and ventilation. Designed with retainer-ready temple tips, these Costa sunglasses seamlessly blend innovative function and coastal style, allowing you to explore freely.