What is a dryer ball you ask? Think of it as an almost never ending supply of fabric softener. These tumblers are handmade of 100% premium virgin wool. They are designed to lift and separate laundry increasing the flow of air without leaving fluff on your clothes. This process cuts drying time by 20-30% and they make clothes softer, reduce wrinkles making ironing much easier and faster. Simply add 3 balls to your dryer, 6 will work even better. For scented clothes, add a few drops of your favourite essential oil or perfume to each ball. Each ball will last over 100 loads! With Forever New Tumblers you don't need to use chemically formulated fabric softener again.