Costa Del Mar Hammerhead 580P Polarized SunglassesCosta del Mar Hammerhead 580P Polarized Sunglasses will change the way you fish! These sunglasses are simply amazing! The frames are constructed of strong TR 90 that is extremely durable, yet lightweight. They are infused with Hydrolite, a rubber material that holds them to your face so they won't fall off, even when wet. The polarized 580P lenses deliver amazing clarity and brilliant colors. They remove all of the bad light and improve your vision.