Jeff Findley wrote:
They don't have to when they're attached to the ship's air supply.

I know. I was addressing the internal capabilities of existing suits.

I'd imagine that the suits used in the CEV will need umbilical attachments
to handle just such a contingency. It would be easy enough to provide a
drinking water supply through the umbilical. Since you've got air and
cooling water connections anyway, what's one more connection?

Certainly. If Nog is asking about a hypothetical situation where new
suits can be designed for long-term, sealed habitation, there's quite a
few options for creating long endurance spacesuits.

Mike Miller