Tony Stark Light-Up Arc Reactor LED Iron Man Black Vest Prop Replica--Size M Black color, soft and resilient LYCRA cotton vest containing containing a LED light-up Arc Reactor.Prop Replica vest as Tony Stark wears in the Iron Man Movie. LED EL panel attached to the vest with Velcro, can be removed and replaced. Machine & hand washable (all electrical components can be removed from the vest). Powered by a battery pack cleverly hidden within an inside vest pocket. Requires 4* AAA batteries (not included). Please see the size chart as picture shown. Size M fits 5.2 ft~5.6 ft.