AV58MIXThin and spare, these aviator sunglasses for men are designed by Air Force. The frame is all metal, made to be flexible, yet tough enough to be worn in active situations. The arms are thin and straight with a sharp curve at the ear and plastic earpieces for better fit. The lenses are round and set between a double bridge construction that adds strength to the frame. The lenses are dark, giving you excellent protection from ultraviolet rays.