Dry The Natural Way. Drying your washable rug the right way is as important as washing it right. Tumble drying at a low temperature with our wool dryer balls will not only ensure it turns out soft and fluffy—you will also save energy and cut down drying time by 25%. Discover a sustainable alternative to fabric-softeners and plastic dryer balls that makes all the difference. And what is more, it is reusable up to 1,000 times!