Himself Christopher Hadfield during his career, twice went into space.
At the time of being in outer space in a spacesuit is created a reduced pressure, which it does not work to swipe. This was told by canadian astronaut Christopher Hadfield.
“the Air is too thin at a pressure of 4.3 pounds per square inch,” he answered a question from one of my subscribers on a personal website.
Such a pressure equal to 220 millimeters of mercury, intentionally understated inside of the suit to facilitate the work in it.
Astronaut Christopher Hadfield performed two spacewalks during his career. In addition, he is known for recording the video for the song by the British rock musician David Bowie made directly to the International space station.