If sleeping bags are stored long term packed tight, they lose loft and become less effective. I store mine in a large shopping bag next to my BOB. I can easily carry both for a short/medium distance. It takes less than a minute to cram it in at the top of my BOB. If I can’t grab it, I still have an emergency bivvy that can get me by. Also, hair ties are a fairly versatile fastener and easy to forget, even when you use one every day.