I would guess they are referring to normal heat transfer papers rather than plastisol, though it's hard to say of course

If so - ribbed ans transfer papers don't mix very well.
You can potentially get an okay image, depnding on just how much of the stretch factor is going to be in use. Best bet would be to try a sample out and see how it works for you; I wouldn't suggest offering them to anyone or accepting orders until you've tested them in this fashion.