I rather doubt that the uniforms -- even if they were made of the super duper materials cited above -- could serve as pressure suits. And even if they were, that doesn't mean they're space suits. Pressure suits were (and are) created for high-G flying, so that pilots don't black out. So what's the point in space, if we have nifty cancellation of inertia?
But let's say that they're all actually space suits, and that everyone has helmets at hand.
Umm . . . oxygen?