Urine Gone ProClean Probiotic is an enzyme-based all surface stain and odor terminator. Formula contains billions of non-pathogenic probiotic bacteria that eliminate tough pet and people stains and odors. ProClean penetrates, dissolves, and consumes all organic matter that causes stain and odor (urine, feces, blood, vomit, and saliva.) ProClean keeps working until all stain matter and odor is gone which helps prevent pets from re-marking territory. Bottle contains 20 oz.