Simple Solution Extreme Cat Stain & Odor Remover is 3x stronger (vs. Simple Solution Cat Stain & Odor) to eliminate tough cat odors and stains faster. Extreme Cat Stain and Odor Remover has a professional strength formula that contains Pro-Bacteria and enzymes that completely breaks down organic residue, permanently eliminates stains and odors, and discourages cats from repeat marking the area. It removes urine, feces and vomit from carpet, upholstery or other water-safe surfaces in your home. And, it's safe to use around children and pets when used as directed.