Conveniently pre-measured single pac to contain the right combination of powerful detergent. Dissolves completely, leaving nothing behind but clean. Helps remove three of the top everyday allergens—dust mite matter, cat and dog dander—as well as certain fragrances. Safe for all washing machines, including high efficiency ones. Simple to use, place one pac directly in washing machine drum. Hypoallergenic. Clinically proven to be gentle on skin.