Space suit (spacesuit) Special clothing worn by astronauts to ensure their life safety when performing missions in space, including intravehicular space suits and extravehicular space suits. The intravehicular spacesuit is the pressure emergency life-saving equipment for astronauts in manned spacecraft. It is generally used in the standby section, ascent section, return section, orbit change, rendezvous and docking process, or when the spacecraft has pressure emergency, to provide life support for astronauts. Extravehicular spacesuit is the personal protective equipment used by astronauts when they are out of the cabin, which is equivalent to a small spacecraft and is used to support life and operations.