Costa Del Mar Brine Sunglasses are made for people that love the saltwater. True high-performance equipment, Brine Sunglasses are made with integral hinges for easy on/off access, vented Hydrolite temples to keep you cool, and co-injected, cold-molding technology that delivers a comfortable fit to keep you focused on dragging fish into the boat. The Brine features Costa's 400G Lens, which is designed for adventure and built to perform with superior clarity, contrast, and definition. These durable 400G Lenses are made of LightWAVE glass that's 20% thinner and 22% lighter. For the optimal fishing environment, Costa Green Mirror lenses offer advanced visual acuity, which is perfect for fishing inshore, flats, rivers, and streams. These lenses allow a minimal 10% light transmission. Every pair of Costas features 100% polarized lenses, providing complete UVA, UVB, and UVC protection, as well as a lifetime warranty against defects in materials and workmanship.