ZERO ODOR's Laundry Odor Eliminator is a patented technological breakthrough designed to permanently eliminate all unpleasant laundry odors. Odors/Smells that we consider unpleasant all share a consistent set of traits -like a signature, which ZERO ODOR Laundry is attracted to. Simply add ZERO ODOR Laundry to the wash along with your favorite detergent and our odor eliminating formula immediately seeks out and eliminates any unpleasant/offensive odor molecules in your clothes, fabrics or washing machine. ZERO ODOR Laundry will not remove any desired scents/fragrances from your favorite detergent or fabric softener; our formula only seeks out and removes the unpleasant/offensive odors. ZERO ODOR Laundry is non-toxic, non-irritating, biodegradable and cruelty free. Our Laundry formula has been tested and gases (odors) that represent the constituent elements of all known odors and in all cases, ZERO ODOR Laundry reduced the presence of the odor to an immeasurable level, permanently. Perfect for eliminating odors such as: Smoke/cigars, pet odors, incontinence issue, musky towels, sweaty work or gym apparel, mildew and any unwanted odor.