Abstract: A rocket stage for a multistage space launch vehicle, wherein the rocket stage includes a main engine and is configured for stage separation from remaining parts of the space launch vehicle such that the rocket stage returns to the surface of the earth, wherein rocket stage includes an inflatable hull configured to retain lifting gas from a pressure tank, an inflation unit, a propulsion and steering unit configured to provide thrust and attitude control to the rocket stage, and a control unit configured to initiate inflation of the hull by controlling the inflation unit after the stage separation and to control the propulsion and steering unit to maneuver the rocket stage to a specified landing site on the surface of the earth.