I don't have a permanent design wall yet. I use a thin wool ARC blanket & everything sticks to that just great. I toss it in the wash plenty often because I also like how warm it is in winter. As long as you're not putting it in hot water or high heat, it should hold up fine. By the time it's felt, the wool fibers have already shrunk & condensed, so they're actually less prone to shrinkage than regular wool.