Edge loops.

Part of what basicwiz was trying to point out about dynamic clothing is that when it's poorly made it usually doesn't have edge loops like the models you are trying to drape them over, so you get unrealistic draping, folding and movement. This is intensified if you are trying to run a sim on a unitard that is coming in at over 40,000 polys.

Seams and the like can be modeled in. UV mapping is, I think, a no-brainer. But most of the dynamic clothing I have been dealing with (and creating, I am to blame too) the topology doesn't have good edge loops.

If I had a nickle for ever time a woman told me to get lost, I could buy Manhattan.