... free, no harm, natural & healthy 3.Long life span magic washing ball / cleaning ball1.material:TPR+CERAMIC BALL2.packing:each in color ... :1,put the cloths into the machine, then put the laundry balls, no need to add any general washing detergents. 2 ... naturally, repeat the steps above next time. 6, Clean the laundry balls every month, dry it in the sun.