Nellie's™ Dryerballs are designed to reduce drying time and soften fabrics naturally without the use of chemical fabric softeners. As Nellie's™ Dryerballs tumble around in the dryer they lift and seperate fabrics allowing air to flow more efficiently thus reducing drying time up to 25%. Saves you time and money! The unique design of the dryerballs nodules relaxes the fibers during the drying cycle - clothes feel softer and towels naturally more absorbent.