Items insulated with lofty material such as down or synthetic loose fill and synthetic batting should always be stored uncompressed for long term storage. Never packed into a stuff sack or underneath other items for long periods of time. I like to hang them up. Obviously jackets, sweaters, vests, etc can all go on normal closet hangers, but I recommend the same for my sleep systems. I specifically do not sew hang tabs into my sleep systems because of the catastrophic tear out potential. Instead, hang them on a hanger from the top opening where there is the elastic drawcord. If someone were to pull on it, instead of tearing some critical seam out from a hang tab, the drawcord will simply stretch off the hanger. No big deal. If no hangers are available and/or you want to hang on a hook I recommend doing this by the top drawcord as well. Just by the cord itself, where it exits the drawcord tube. You can just loop this over a hook. No, it won’t be able to slip off, but at least the elastic of the cord will stretch and take up any load placed on the bag/quilt.