The suit protects astronauts from heat, cold, and harmful space dust.
Photo Credit: NASA
It gives astronauts air to breathe and water to drink during spacewalks.
Photo Credit: NASA
Under the suit, astronauts wear another piece of clothing. It covers their body except for the head, hands, and feet.
Photo Credit: NASA
On the back of the spacesuit is a backpack. The backpack holds oxygen so astronauts can breathe, and also removes carbon dioxide that astronauts breathe out.
Photo Credit: Flickr
The backpack supplies electricity for the suit, while a fan moves the oxygen through the spacesuit.
Photo Credit: NASA
Connected to the back of the suit is a tool called SAFER. SAFER has several small thruster jets. If an astronaut floats away from the space station, they use SAFER to fly back.