The original Kleen Free Naturally. Please read some of the outstanding customer reviews for more information. Kleen Free is sold as an amazing natural enzyme multi purpose cleaner, and laundry additive. Kleen Free's special blend of the highest quality food grade enzymes and surfactants make it the highest quality product of its kind on the market today. Do not be fooled for imitators, Kleen Free is the original and the best product of its kind GUARANTEED Kleen Free Naturally is a proven biodegradable enzyme cleaner that is used world wide as a natural eliminator and multi-purpose cleaner. Preformed enzymes have been used widely in restaurant and institutional settings for many years, due to their low toxicity and superior cleaning properties. They are also becoming widely accepted in the removal industry, as enzymes leave no toxic residues and the enzymatic effect is quick and safe.