The Costa Fly Line sunglasses in Matte Sand with Copper Silver Mirror 580G Polarized Glass Lenses are built for watermen who demand maximum coverage, clarity and performance on the flats, inshore or offshore. Featuring a large 64mm lens and a full 8‑base wrap design, this frame delivers serious coverage and light protection while maintaining comfort via double‑injected Hydrolite™ nose and temple grips and retainer‐ready temple tips for accessory compatibility. The premium 580G glass lenses combine polarization with Costa’s color‑enhancing technology to reduce glare, block harmful blue and yellow wavelengths and deliver superb clarity—even in demanding light. With a durable injected nylon frame, full wrap profile and regular/large fit geometry, the Fly Line is ideal for anglers, hunters and outdoor enthusiasts seeking high‑end optics, wide field of view and dependable performance built for serious wear.