Four reusable dryer balls, hand crafted from 100% pure New Zealand wool, unbleached, with no fillers or artificial centers. Toss into the dryer to remove wrinkles, save on drying time -- all without harsh chemicals! Wool dryer balls are the all-natural & eco-friendly fabric softer choice for your beloved fabrics. Great for towels, sheets, cloth diapers, clothing, blankets, and all the fabrics in your life! For fun, try adding a few drops of essential oils to the wool for natural fragrance! Simply allow the oil to fully absorb & dry before using.