The Mikki Undercoat Rake is specifically designed to remove tangles, remove loose or dead hair, and thin out thick coats without damaging the top coat. The long teeth of the rake are able to reach the lower layers of thicker coats, helping to ensure a healthy top coat. To use, stand your dog on a mat or newspaper to catch the loose hair or groom outdoors. Gently saw the rake back and forth to loosen any undercoat tangles, removing any excess hair and fluff.