Urine Off is based on enzymes and microbiological components (bacteria) to effectively remove urine and its smell. Urine-off is a unique cleaning agent with biological components that relieves carpets, floors, walls, stone, wood, plastic and almost all furniture of urine smells. The unpleasant smells of urine are caused by crystals. Urine-off practically eats these crystals, preventing cats from smelling that the place was urinated on previously. This reduces the odds of repeats at that specific location. It does not contain bleach, alcohol or peroxide. Safe for people and animals.