Abstract: A removable and movable partition (10) for dividing up the interior of a cargo transporter has a boundary made up of mutually perpendicular inflatable tube sections (11,13,15,17) which rigidify upon inflation and urge themselves tightly into contact with the walls floor and ceiling respectively of the transporter. The inflation of the tubes also tensions between them a double dividing wall (33), of two parallel sheets of flexible material which are respectively secured tangentially to the tubes, and which may have a flap (39) for access to inflation/deflation valves (25,27). Shaped spacer means may be interposed between the tube(s) and floor and ceiling if they are corrugated or otherwise interrupted.