My two large dogs have thick undercoats and were major shedders. The FURminator greatly reduced (like 90%) shedding and made the dogs feel much more comfortable by ending scratching from what I presume to be itching from dead matted fur. Other brushes helped a bit but only the FURminator solved the problem. It improved the quality of life for my pets.
Removes extra hair easily, without pulling my dog's hair or causing pain. Nice for trimming undercoat for summer and to stop shedding.