100% pure wool balls. Cut your drying time down saving you money. You will never have to buy dryer sheets again. Say goodbye to harsh chemical build up in the lint filter and on your clothes. Enjoy 25%-50% less drying time, softer fluffier clothes that are wrinkle free. Unscented or Scented. We inject the 100% Essential oil into the middle of the dryer ball for longer lasting scent.