Costa Del Mar Isabela 580P Polarized SunglassesCosta Del Mar Isabela 580P Polarized Sunglasses are as beautiful as they are effective. Designed to give the lady angler excellent vision while fishing, the Costa Isabela is equal parts performance and style. Costa Isabelas are constructed of TR 90 nylon that is extremely durable. Costa has outfitted these frames with polarized 580P lenses that deliver incredible clarity and brilliant colors, all while blocking the sun's harmful rays and reducing eye