As people cannot survive in space, due to the vacuum conditions and temperature extremes, a spacesuit is required in order to protect them from the environment and keep them alive. A spacesuit is usually worn to carry out activities such as spacewalks.
Spacesuits have various displays, life-support and communication equipment installed in them. Modern spacesuits also have automatic systems which carry out safety checks and monitor the wearer's condition . Some spacesuits have thrusters installed in them , and may also have a port into which an extra gas cylinder can be injected . Spacesuits may also equipped with closable visors, lights and armaments .
When wearing a spacesuit, a person usually ties back their hair and wears a hood in order to prevent it from getting in their way during their spacewalk .