Whenever I saw a clip about making spacesuits they always emphasized that space suits, since day one, were sewn by-hand at some particular company in Delaware.

How can hand-sewn anything maintain 5 psi?

(5 psi from https://en.wikipedia.org/wiki/Space_suit#Operating_pressure)

  • $\begingroup$ Some description of the equipment that was used. gizmodo.com/5788241/how-to-sew-a-spacesuit $\endgroup$
    – BowlOfRed
    Jun 15, 2018 at 17:59
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    $\begingroup$ Fire hoses made from fabric and rubber operate with pressures between 8 and 20 bar (116 and 290 psi). Where is the problem holding 5 psi? Spacesuits are made from many layers, an inner layer made from rubber is airtight and the outer layers made from fabric resist the mechanical forces. $\endgroup$
    – Uwe
    Jun 16, 2018 at 16:36
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    $\begingroup$ I was always under the impression that The outer fabric and inner layers were sealed by hand sewing but it’s only just the outer skin which does not have to hold any air pressure. $\endgroup$ Jun 16, 2018 at 18:23
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    $\begingroup$ So you may answer your own question now. $\endgroup$
    – Uwe
    Jun 16, 2018 at 18:53
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    $\begingroup$ @RandyZeitman it's good practice; if you are interested, take a few minutes to post an answer to your own question. Other people may post answers as well. $\endgroup$
    – uhoh
    Jun 16, 2018 at 22:08

1 Answer 1


The space suits consisted of many layers. There was a liquid cooled undergarment, above that an airtight rubber coated nylon layer holding the pressure.

There are many outer layer made from fabric and foils for micro meteroite protection and to resist the mechanical forces.

The outer layer are not sewn by hand, of course a sewing machine was used whenever possible. No need for airtight stiches through the rubber layer.

See this NASA paper on page 2-34 for a layer description.


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