A tank top is a type of clothing that is typically worn as an upper garment. It is a sleeveless shirt, made from various materials such as cotton or spandex, and fits tightly against the body to provide comfort and support while being worn. The name "tank top" comes from its resemblance to the tanks used by military forces, which are also designed to fit closely against the body for maximum protection and mobility. Tank tops can be worn alone or as an undergarment, and they come in a wide range of styles, colors, and designs to suit different preferences and occasions.