Urine Off Multi-Pet Formula is not a perfume or cover-up. It actually eliminates and removes all three major components of urine odor and stains including proteins found in urine, leaving a refreshingly clean surface. Urine Off has been awarded USDA BioPreferredSM designation as a USDA Certified Biobased Product. Urine Off is a revolutionary biotechnology product that eliminates urine odor and stains at the source, permanently. Urine Off uses a combination of naturally occurring micro-organisms and their enzymes to digest the uric acid crystals (which produce urine's pungent aroma) as well as urea (the sticky substance in urine) and proteins (which promote pathogen growth).