I love the ones from White House Black Market. The butt doesn’t sag and they don’t stretch out. I even wore them thru second tri, and they still bounced back.
These pants. They are the best. They're ponte material, so they're thicker, they have a "seam" to dress them up, and they sit a little higher, so muffin top gets smoothed out. And they were dirt cheap. Like $9 on sale. I can't seem to find them anywhere other than Le Tote though.