I’m not a super big fan of slouch either. But when it comes to my rogue 36 bags or this black rogue I don’t mind some slouch. I actually packed some of the tissue in the outer corners of the side pockets and that helped a ton! I’ll keep it there when using because I only put my phone and work swipe card in the front one anyways and it doesn’t get in the way. I also use larger pouches on the inside, the size 26 pouches with the the turnlocks and that helps prop up the zipper. I also store them with the foam inserts they come shipped with and I think that really helps them keep a more boxy shape when not in use. I’ll try and post a pic later with the bag empty and then filled with the items I use and the tissue in the corners, it’s a HUGE difference