I just a new Uhlmann FIE stretch jacket and knickers and they fit snugly, but comfortably. I was wondering though if over time these tend stretch out a bit more, shrink, or pretty much keep their shape. My experience with other jackets is that nylon tends to stretch out and cotton tends to shrink, but this is my first stretch FIE and I need to know whether I should actually get a size large.

Tomas