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Most current extravehicular activity spacesuits are very thick and chunky, like EMU or Orlan. Even though NASA/MIT work on something thinner (Bio Suit), it's not for EVA in vacuum of space, but for surface activity on Mars, where there is some atmospheric pressure.

So what are the components that make spacesuits so thick and bulky? What if we had a layer of graphene composite, custom-shaped to the size of the wearer? I mean if we can make one, would the thinner outer layer eliminate the bulkiness, and enable thinner suits only requiring temperature regulators, so astronauts could handle more delicate equipment and improve mobility in space?

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