You better read up on the rules of sumo if you're going to sport this costume! The tan jumpsuit is 100% nylon and has a sewn in black sash around the waist typical of sumo wear. The jumpsuit zips in the back for easy in and out. This costume comes with a battery operated inflator fan, so you can get the full sumo wrestler effect. Be sure to pick up a sumo wig so you have matching hair to your costume!