PZ1801Polarized sunglasses add an extra layer of protection between your eyes and the sun, and these sweet shades by X Loop offer that and more. Fashioned in the classic aviator style, the frame is made of metal with a lightweight and flexible construction. The arms are straight and thin and curve down sharply at the earpieces that have a plastic coating for better fit. The lenses are dark and set between a double bridge that adds strength.