I adore these! I've purchased many pairs now because I like them so much. As "leggings," they aren't pants, more like heavy tights. But these are wonderfully stretchy and fit me perfectly. And guess what? I'm not pregnant! I just have a big tummy that never went down after my third baby (due to separated abdominal muscles, known as "diastasis recti").
Other tights, leggings, and yoga pants creep down during the day because my tummy is so big. When I tried these (even though it was embarrassing to need to!), I discovered they are not only excellent overall quality, but the panel is large enough to stay up all day. I've worn this brand for over a year now and they've never slipped down.