MobileSharp6Pcs Reusable Laundry Washing Machine Tumble Dryer Cleaning Balls Cleaner Eco-friendly - the natural way to soften fabrics Can be used in any tumble or washer dryer These balls tumble in the dryer to lift and separate laundry. This allows hot air to circulate between the clothes more efficiently so aiding drying and reducing drying times thus saving energy The soft shape of the balls gently massage the fibres to naturally fluff up the fabric without the use of chemicals or dryer sheets,Prevent washing twist and tangle together Material: Soft Plastic