These are very flexible and have no shape (cardboard) which is good because the height of my underbed is shallow.  They hold a lot more than I thought they would and so far I've only needed two of them instead of four.  If you're looking for a more solid and tighter seal to store clothes, perhaps you should look elsewhere but these were just what I needed.  The handles do not come the direction as shown either just FYI but that did not matter to me.