Wool Dryer Ball by Woolzies made of 100% New Zealand Wool. Woolzies dryer balls naturally soften laundry and reduce wrinkles. They bounce around inside the dryer creating space between laundry items. This allows the hot air to circulate, reducing drying time by up to 25% and saving you electricity and money. They are super quiet and reduce static build up. These dryer balls can be used over and over again as they last for up to 1,000 loads. For great smelling laundry, pair Woolzies dryer balls with your favorite essential oils. Add 3-6 drops of your desired essential oil to the dryer balls and put them in the dryer after your clothes have already been dried. Run the dryer again on an Air Fluff (non-heated) cycle for 10 minutes and your laundry will come out smelling amazing and fresh.