My pelvic floor physio recommended I wear these while returning to running postpartum. I think these could be great pelvic support underwear, but it's so hard to get a good fit that I would actually recommend that anyone considering it purchase only if they are able to try on in person.
I bought size L based on my measurements, and they're not just one size off, they're possibly two or three sizes off. I can get them on (with the sound of a couple threads breaking), but can only wear for a minute or so before they start rolling down. There's no way I could wear these for the recommended 8 hours. It's not a great feeling postpartum to not be able to wear clothes that should, in theory, be able to fit. I had a vaginal delivery and I can't imagine attempting to get these on if I'd had a c-section.
Shipping outside of Australia is expensive, and customer service has not responded to my inquiry about an exchange yet (sent 5 days ago.) I really want to like this, but for the cost, the sizing is a fiction, shipping expensive, and customer service lacking. To anyone considering, I recommend looking at support brands that are locally available.