If your dog tends to have knots, use the rotating comb as it slips easily through the hair opening the knots much better. The comb is the best tool for brushing and opening knots. In semi-long and long haired dogs and cats, brushing is essential for the good health of their skin and coat. A good brushing removes knots, tangles, loose hair and dirt. It stimulates the hair follicles and helps distribute the skin's natural oils through the coat. Gloria combs are made to last longer: they are comfortable and resistant. There are many types of combs: the classic one, the one with rotating teeth, 2 height, anti-flea or face.