For hair longer than collarbone length [SEP] I tried this with collarbone length hair and it was pretty challenging to get it wrapped effectively. I ended up with some decent curls in the front but straight in the back. The rod is really long too, so once wrapped I had about a foot extra on each side just hangin there. I don’t imagine I could actually sleep with it on. I think it’s a good concept for someone with really long hair looking for loose curls. Can’t little buns do that too? Scrunchies are really silky and cute, so I’ll at least keep those and use them!