The Costa Cocos Polarized Sunglasses are equipped to handle the saltiest, sweatiest, and most humid of environments with their corrosion resistant Monel metal frame. These polarized shades reduce glare off the shimmering water, and they block 100% of harmful UV rays when you're fishing from sunrise to sunset. Hydrolite nose and temple pads comfortably grip your face as you're working on your casting technique, ensuring these stunners don't fall into the water. The Costa 580 glass lens offers premium, crystal clear optics by filtering out yellow and high energy blue light. This enables you to not only see colors in high definition, but it also reduces haze for visual acuity on the sunniest of days. In addition, these glass lenses are much thinner than standard polarized glass, reducing weight by 22% for a comfortable feel that won't weigh you down.