Costa Ballast Polarized Sunglasses - Shiny Black/Blue Mirror - Perfect for an afternoon spent beachcombing or voyaging out on the water, Costa's Ballast sunglasses are ready for whatever the day brings. Frameless and almost weightless, these Polarized Costa men's sunglasses boast a durable TR90 nylon and weigh in at a lightweight 16 grams. Whatever watersport or waterside adventure a day on the water brings, Costa's Ballast are always looking to uncover something new. Features Premium Polarized 580 Lenses -Filtering reflective glare is essential for anyone on the water or outdoors. 100% UV Protection - Your Costas absorb 100% of UV light, providing you the best in light management and protection. Scratch Resistant and Durable - The C-Wall coating provides extra scratch-resistance and a barrier that repels water, oil and sweat for easy cleaning. Lens Material is Polarized Polycarbonate (580P) Includes a case and cleaning cloth.