Draft stopper stuffing suggestions?

[mubeimmik.livejournal.com]

I need to make some draft stoppers for my window in the livingroom. I'm curious about what people usually use to stuff theirs. I can use fiber-fil, but that doesn't seem like it'd weigh enough to stay in place, and my window is almost 3 meters wide and that's a LOT of fiber-fil! Thanks for any suggestions =)