Sunglasses for men don't have to be boring. Take a look at these nice shades by Nitrogen that combine a square look with a sweeping curve that is stylish and attractive. The frame is made of plastic, designed to be durable and strong, but also contoured to fit snugly and comfortably. The arms start thick, then lose the lower panel through a taper to the ear. The Nitrogen logo is seen on the arms. The lenses are dark and block out harmful ultraviolet rays.