Used as an additive, this laundry sanitizer kills 99.9% of bacteria on clothes. Contains 0% bleach, works in cold water and is suitable to use with both whites and colors. Just add to the fabric softener compartment or directly into the water during the rinse cycle. Works in standard and HE washers. Can be used on most machine washable fabric items, including baby clothes, gym clothes, towels, bedding, undergarments and delicates.