Universal Accessory. The dryer balls contain specially designed nodes to physically breakdown the stiffness created by water drying in fabric, thus softening the laundry without the introduction of toxic chemicals. The balls work in combination to lift and separate the laundry while tumble drying. They also retain the heat and transfer it to the clothes as they tumble, aiding the drying process. Set includes: 3 x Dryer Balls. Unilux is also part of the Electrolux family of brands so you can be assured of its quality and reliability.