Replace toxic dryer sheets and use wool dryer balls that you can infuse with your favorite essential oil - simply apply 8-10 drops every 3-4 loads. Wool dryer balls are perfect for keeping your clothes, cloth diapers, towels and more soft and chemical-free. ... 100% wool dryer balls increase fluffiness and reduce static as dryer loads tumble. Dryer balls help to soften clothes naturally. Dryer balls are made from a renewable resource.