Inflatable Sumo Costume, Inflatable Chef Costume, Inflatable Willy Costume, Inflatable Trainer Costume. Perfect for a fancy dress party this Inflatable Sumo Costume will have your friends wrestling with you in seconds, and with a fan that can keep it inflated for up to seven hours there will plenty of time for fun and frolics. It is easy to inflate and put on: simply step into the costume, turn on the fan (discreetly hidden inside the outfit) and you will be fully inflated within 60 seconds.