Zero Odor Laundry is designed to solve the growing problem of laundry odor that survives the wash cycle. Unlike other laundry fresheners or odor removers Zero Odor Laundry seeks out and bonds with odor molecules in your clothes and washing machine, permanently turning them into non-odor molecules instead of just masking them. Its patented technology eliminates odor in all types of laundry items including: activewear, cooking, perspiration, grease, smoke infused clothes, musty towels, pet, mildew and more. It also acts as a washer cleaner removing odors that commonly occur, especially inside front-loading washing machines. The 64 ounce concentrate is Made in the USA and is non-toxic, non-irritating, and biodegradable. It is designed for traditional and HE washing machines and is safe to use with all detergents, soaps, fabric softeners, and other laundry additives. Suitable for all clothes no matter the color. It is designed to be poured into the wash cycle right after you add your favorite detergent.