Inflatable Dinosaur Costume Riding T Rex Air Blow up Funny Fancy Dress Party Halloween Costume for Kids Adult100% Polyester Drawstring closure Hand Wash Only Air Pump Requires Portable Power Bank or 4 AA Batteries. (Batteries Not Included) Excellent Craftsmanship The T Rex costumes for Halloween are made of high strength waterproof polyester which is against rips and tears, the excellent stitching improves the durability of the inflatable costumes. Moreover, our costumes are providing with a powerful duty blower to continuous airflow inflate the costumes.