Harness the natural properties of wool for eco and effective fabric softening that shaves dryer time. Naturally anti-microbial wool makes fabrics cuddly soft. Moisture-absorbing wool cuts drying time. Balls (unlike sheets) increase air circulation in your dryer, reducing wrinkles and static. 100% wool is hypoallergenic and fragrance-free. Guaranteed to last over 1000 loads. 3 per pack.