Shop 6S9131 Mainsail XL in Los Angeles, CA

Explore the water with the Costa 6S9131 Mainsail XL sunglasses, crafted for bold performance and designed for watermen who live to chase horizons. These square frames, made from durable nylon & propionate, feature a modern multicolor front that stands out. These polarized Costa sunglasses for men come with mirrored grey lenses that reduce glare, enhance clarity, and offer 100% UVA/UVB protection even in intense light. Integrated side shields and hooding ensure minimal light leakage, while vented nose pads keep things fog-free, promising uncompromising comfort and coverage. With retainer-ready temple tips, these full-rim frames are built for those who need water to breathe.