Sustainable dryer balls Gentle on your laundry. Gentle on the world. Made of 100% wool! For soft laundry and fewer wrinkles. 100% Natural, eco-friendly, reusable & energy-saving. Make your drying routine more sustainable with our 100% wool dryer balls. These natural and reusable balls ensure that your laundry dries faster, wrinkles less and feels wonderfully soft. They come in a bag of 6. You can also use the bag as a nice storage bag for your dryer.