I store my fabric in the big rubbermaid totes too. Like Cathe, I'm always in there and they are not sealed tight so I'm not too worried. I finally tried to quit buying so much fabric and start using what I have. haha..partially due to my husband saying "Honey, are you ever going to use the fabric you have". So I figured, I'd try to use a lot of it up then go buy lots more. :)