Costa Del Mar designers aren"t sitting in an ivory tower mulling over what sunglasses should and shouldn"t be. They"re out in the Keys casting after bonefish, permit, and tarpon, and it"s that experience that informs the design of shades like the Tower Polarized Sunglasses. The sleek monel alloy frame provides tough corrosion resistance while the impact and scratch resistant 580P lenses cut the glare so you"ll never miss a detail out on the water.