Sagging bottom on jumpsuit

[Shallysally]

Is there any way I can stop this happening?! Jumpsuit is the eco viscose material. It has a tie belt, which I fasten quite tightly.

The jumpsuit is roomy, not right at all and plenty of room for my, ahem, ample posterior 😬

How did you launder it? Did you follow the instructions?
I have a couple of jumpsuits but both are heavy cotton - and they don't sag. I would opt for cotton next time, but my condolences, it's always sad to see an item near the end of its natural life.

It was the first time I’d worn it! I was going to buy it in the other colours too as it looks so nice on.
I’ll look for cotton ones, thank you!