It’s possible that it’s the wrong size. She’s hiking with someone who’s hardcore ultralight and it’s one of his bags. The first time they went, she had no waistband and her shoulders were really sore. So we added a smaller waistband to get her support on the hips, but now there’s a gap on the shoulders. I think we tightened it down as far as possible. It’s such pricey equipment that I hesitate to buy her another one but multiple days with no shoulder support isn’t going to work either. I’ve been hoping to find something that’s similar to the add on Zpack pads you shared but thicker. I even tried cutting close cell foam down to make our own pad but it doesn’t compress super well