Frameless and nearly weightless, Costa's Ballast men's sunglasses are ready for whatever aquatic adventure awaits you. With it's durable TR90 nylon, you might not even remember you're wearing them! But the patented 580 polarized, 100% UV Protection lenses make sure every view is one you won't soon forget. And as always, every pair of Costa sunglasses comes with a Costa Case, cleaning cloth, and manufacturer's Limited Lifetime Warranty.