Do the astronauts wear space suits inside the shuttle too?

Inside the Shuttle orbiter, as well as other Crew Spacecrafts, pressurized conditions are maintained. Hence the suit is not required. However, during launch and re-entry, crew keeps their suit on for any contingency. This suit (ACES for Shuttle) is different from the extra-vehicular activity suit. read more

Inside the Space Shuttle, the air pressure is kept at 1 atmosphere, which is the same level as on earth. The temperature and humidity are controlled, so that, the astronauts can live comfortably. Therefore, except for the orange flight suits that are worn during launch and reentry, the astronauts do not need any special clothes. read more