PHASE I:

Me: (((((((((((((( YELLOW VERTICAL STRIPE)))))))))))))))))
AI: HUH?

ME: I SAID YELLOW VERTICAL STRIPE! NOT A YELLOW JUMPSUIT!
AI: ....

ME: Hmm, never mind the stripe, these ones look pretty damn nice... Anyways, let us continue...

PHASE II:

ME: Okay, I think we're getting better...

ME: WHAT! NO!
AI: ...
ME: I think it's time to alter a few things in the prompt...

PHASE III:

ME: I think we're getting better with the vertical stripe thing...
AI:...

ME: Look, pal... I said yellow VERTICAL stripe, IN THE FRONT...

ME: Okay, that's a pretty good one, though not quite what I want...

ME: Yeah, that's more like it...
AI: ...

ME: Okay, never mind, that's enough for today...

The journey (((((might))))) continue when my frustration with the 'yellow vertical stripe' is gone...

PHASE IV:

Okay, this is the best I was able to create. Still not that close to a real vault suit, but the last one is pretty good I think. Lots of new ideas for different vault suits though.

UPDATE: Got it pretty close this time, I would say...

Note: If you're curious what prompts I used to create these images, unfortunately I didn't keep them, and the images are most likely deleted from my gallery at this point, but what I basically did was this: Describe the girl (age, appearance etc.), describe what a 'vault' is, describe what a 'vault suit' is, how it looks like, and then finally describe the scene e.g. "the girl wearing a vault suit inside a vault". You should first look at the public gallery and copy the prompts (both the positive and the negative parts) from images you like and then add your own stuff. That's what I did.