Wool dryer balls - natural fabric softener, reusable, reduces clothing wrinkles and saves drying time. 100% New Zealand premium wool with no synthetic fillers, rolled into tight, extra-large balls and felted for a natural, long lasting product. Replace chemically infused dryer sheets and liquid fabric softeners with an eco-friendly and natural alternative that will last more than a thousand dryer loads. As the dryer balls tumble around in the dryer, they lift and separate laundry allowing the hot air to circulate better and dry faster.