The FURminator Long Hair Dog Undercoat DeShedding Tool reduces shedding up to 90 percent. The dog grooming tool is specially designed to reach through the topcoat to safely and easily remove loose hair and undercoat without damaging the coat or cutting the skin. The ergonomic handle makes grooming easy, and the FURejector button releases hair with ease. This dog deshedding tool stimulates natural oil production in pets, which protects skin and promotes healthy, shiny coats. This dog shedding brush is for large dogs with long hair. Shedding is natural; there's no way to eliminate it. But you can eliminate the frustration associated with it.