The Costa Fantail 580P Polarized Sunglasses cut the surface glare on the water so we can see that tarpon about to absolutely crush our fly. The Fantails' polycarbonate lenses are crafted to the needs of anglers with their superior on-water clarity, and they're durable and impact-resistant for added peace of mind when you inadvertently trout set, sending your fly careening back towards your melon.