Totes are efficient in stacking, but they do not adapt to size, meaing you always have a little empty space left.

For large fluffy items (sleeping bags, downjackets, skipants) stored in house, i used IKEA bags. They are cheap, square, nice and big for you sleeping bags and if there is a odd shape in the closet, it's not really a issue. I keep the top uncovered so air can flow. Also much easier to handle if you want to put them in the top shelf on a closet.