So-Gentle is a tearless and soap-free! It is mild enough for even the sensitive pets. Scientifically formulated, So-Gentle is free of perfume and dye that will not leave an irritating residue. Derived from natural regrowable sources such as corn, coconut, and palm lernel oils, it has been extensively tested to ensure the utmost in mildness for skin and eyes by in-vitro methods, a non-animal testing procedure.