The Boy's Muscle Shirt can be worn alone or as part of a costume. The Muscle shirt features padding in the arms, chest and abdomen that rivals any professional body builder. You can use it as part of a body builder costume, a pro wrestler costume, the Terminator or any other costume that requires him to be ripped and buff. This is a great way for a thin young boy to feel like a big tough guy. The muscle shirt is a pullover with a neck tie in the back.