The undercoat rake is ideal for quickly and efficiently removing loose or fallen hair from the undercoat. By using the undercoat rake you also prevent the hair from knotting. Use the rake before bathing or showering your dog. The undercoat will remain intact. Clean the undercoat rake regularly with water and an antiseptic solution such as Dettol or Barbicide to prevent bacterial growth. Then let them dry thoroughly! For dog breeds like Collies, Shelties, Samoyeds, etc.