For the ultimate combination of style and functionality, reach for the Ballast sunglasses from Costa C-Mates Bifocal Readers. These shades feature the unbeatable combination of the Costa lenses you love and the readers you need. The hypoallergenic bio-based nylon frames ensure lightweight, hassle-free wear. The rectangular lenses in a unisex wrap design are flattering and functional, blocking light from a wide range of your visual field. With 100% UV protection and polarization on all their lenses, the Costa brand is renowned among fishing enthusiasts as the best protective sunglasses for a water-intensive lifestyle.