An odor destoyer designed to eliminate the toughest cat odors in and around the litter box. Specially formulated enzyme solution that will completely eliminate odors, even old, deep-set odors. Neutralizes odors without adding a smelly perfumed cover-up scent. Advanced formula works on all litter, airborne, fabric and hard surfaces. Water, Nature s Enzymes, Methylcholoisothiazolinone, Methylisothiazolinone. 24 OUNCE