Biokleen's Bac-Out's bio-enzymatic cleaning power removes the toughest stains and odors. From pet mishaps to wine spills, Bac-Out works wonders on fabrics, laundry, carpets, furniture and more. It safely eliminates stains, odors and urine from your furry friend's favorite areas. It contains live enzyme cultures that break down stains and odors into tiny particles. This type of enzymatic cleaning allows for continued elimination of the stain and odor.