Dryer Balls will soften fabrics naturally and cut down on drying time. How does it work" Dryer balls tumble in the dryer to lift and separate laundry allowing air to flow more efficiently. The soft nodules naturally fluff and soften without the use of chemicals. Safe for all fabrics. Fabric softeners prevent your clothes and towels from breathing and reduce their absorbency - that's why dryer balls are great laundry solution for everyone! Hypoallergenic & Reusuable! Unlike fabric softeners Dryer Balls are completely non-tonic and allergy free! Dryer Balls will never melt! They are made of PVC plastic which can withstand very high temperatures. This is the same plastic that your hot water pipes are made from in your house.