This is a set of 2 dryer balls that are chemical and allergy free. Simply pop these softening balls into your drying cycle and you’ll immediately have soft clothing - without using all those harsh chemicals. Also, these balls are proven to reduce drying time. The balls will be continually bouncing around the dryer's metal drum, separating the clothes from each other, increasing airflow in between each item. You’ll notice that your clothes have never looked healthier or felt softer!