Crafted for water explorers and adventurers, the Costa 6S9131 Mainsail XL sunglasses deliver bold functionality and sleek style. These square, full-rim frames in grey nylon and propionate offer a structured look and exceptional durability. Polarized blue mirrored sunglasses lenses cut through glare and enhance contrast, letting you See What's Out There with clarity and confidence. Micro side shields, hooding, and vented nose pads ensure heightened coverage, reduced light leak, and fog resistance, while these sunglasses' universal fit and retainer-ready temple tips add versatility and security. Perfect for those who live for the water, these shades are your ultimate companion offshore.