 The chest section attached to the leg section with special locking clips.The bottom section of the suit hinged at the top of the legs, allowing Robby to both bend forward and swing each leg backward and forward slightly enabling him to walk with relative ease (albeit with rather small and stiff steps).Robby's legs were made from interlocking globes of vacuum-formed plastic which were connected by internal jointing that permitted the entire leg to bend slightly but cleverly concealed the movement of the hips and knees of the human operator inside.