Costa Del Mar Saltbreak 580P Polarized SunglassesCosta Del Mar Saltbreak 580P Polarized Sunglasses are great on and off the water. The 580P polarized lenses deliver amazing clarity and brilliant colors. They block out 100% of the sun's harmful rays and reduce eye strain. They are also lightweight, scratch and impact resistant. The frames are durable nylon that can take a beating. They are lined with Hydrolite, a rubber material that keeps them on your face, even when you're covered in sweat from