I am using comic boards...I think they come in two sizes and I have the bigger size. I wish I would have doubled them up to make them a tab bit stiffer, but they work pretty good. I'm using the big metal paper clips right now, not concerned with moisture in my closet, so don't have to worry about rust. I do have some fabrics stored in plastic bins though...like 30's, batiks, projects, kits. I'm thinking about drilling several holes in these bins to provide air circulation.....what do you think about that....would that help? I like the bins because they stack so nicely.