Pimpant Dryer Balls are a set of 3 balls made from 100% natural , untreated wool, ideal for eco-friendly and efficient drying. These balls stir the laundry in the dryer, reducing the drying cycle time by up to 25% . They also help reduce static electricity and make ironing easier , while respecting the environment. These dryer balls are a zero-waste alternative and a way to extend the life of your clothes.