Are flight suits such as the A/kt Armored and TX-1 naturally vacuum sealed or do players need to spend hard points on them?

The wing commander suit (Stay on Target) says it can be sealed from vacuum and treated as an emergency vacuum suit. Personally I would treat it as having the vacuum sealed attachment for these purposes. The TX-3 (Suns of Fortune) says that without an external source of oxygen that the wearer can survive for 24 hours. So, again, I would treat as being vacuum sealed but with 24 hours of reserve oxygen.

I'd rule any armour that either specifically states in the fluff that it's vacuum-proofed OR is a dedicated flight suit to be vacuum sealed. It seems like a pretty natural thing for a flight suit for use in space to be.