Head from the boat to your back deck in the protective Costa Bayside Polarized 580P Sunglasses. Equipped to fight eye fatigue, the polarized 580P glass lenses filter out harsh glare and UV rays while enhancing contrast and colors for a view that pops. Then, the eco-friendly Bio-Resin frame construction delivers a soft, secure fit, thanks also in part to the slip-free Hydrolite temple and nose pads, keeping these shades firmly in place over choppy waters.