These shield-style sunglasses are made for men by Polarspex. The lenses are rectangular in shape and connect together in the middle to create a protective shield for your eyes, made even better because they are polarized for added protection from the sun and glare elimination. The frame is made of metal, lightweight and flexible, yet still tough enough to withstand use. The arms are thin and straight with a sharp curve at the ear that is covered with a plastic sleeve for better fit.