100% Polyester COSTUME INCLUDES: Jumpsuit With Boot Tops, Belt, Cape, Mask OFFICIALLY LICENSED: DC Comics Batman. THE RIGHT FIT: Boys size medium (8-10), when deciding size, please note costumes run smaller than apparel IMPORTANT DETAILS: Jumpsuit with printed detailing and hook and loop closure in back with detachable cape EVERY DAY IS AN OCCASION: Great for Halloween, themed parties, festivals, cosplay events, or anytime, because life is more fun in costume. COSTUME DESTINATION: Rubies aims to spark joy and creativity worldwide as your go-to destination for expertly crafted costumes, accessories, and all celebration needs COSTUME DESTINATION: Rubies aims to spark joy and creativity worldwide as your go-to destination for expertly crafted costumes, accessories, and all celebration needs COSTUME DESTINATION: Rubies aims to spark joy and creativity worldwide as your go-to destination for expertly crafted costumes, accessories, and all celebration needs