Whether you're hanging out on the beach, boat, or that cafe off Main Street, Costa Bayside Sunglasses will keep your eyes as comfortable as your body. Bayside shades are made with Costa's patented durable bio-resin nylon and polarized lenses with 100% UV protection. Baysides feature Hydrolite® co-injected linings and ventilation ports to ensure that this softer lifestyle frame can handle rougher days on the water.