Quoting DifferentDay:" Ahhh good point that would probably do it. I think the bella thing has more spandexy material or rubber ... [snip!] ... it to roll if it wasn't the right size, mine is honestly like a tube top. fabric folded over and sewn together I paid $10."
I would easily pay 10, I just got freaked after seeing the reviews. But I was trying to think of why that would do that. It has to be size. I have worked with spandex enough to know if it is to small it will be a pain and roll. It just won't stay. I should make some using some jersey knit fabric. I plan to BF so I need layering things to keep covered.