Design Features The top cover is made of high quality ABS material, low carbon, durable, comfortable to touch, sturdy and portable, silicone bristles are soft and comfortable, odorless and harmless to the skin, as humanized desig goes well with palm and fingers, so that the brushes can massage the scalp more easily on the hand. Multiple functions Scalp massager with soft, thick silicone bristles stimulates blood flow to the scalp and oil glands. Shampoo brush you can thoroughly cleanse your hair roots and massage the scalp. relieve hair loss and promote hair growth. Remove peeling and flakes. Relieve stress and relax muscles (never damage your hair and scalp) Applicable Group The shampoo hairbrush is suitable for men, women and pets. Also applies to any type of scalp and hair (whether thick or thin, short or long, oily or dry hair). Pets can also bathe or remove hair with this brush Portable and Convenient The head massager measures 4.1 x 2.8 inches, easy to hold and carry,,. Whether you are on the go, at home or in the office, your head can still enjoy massages and relaxation Don't worry about stagnant water Save yourself the worry of mold forming on such an intimate item that is used every day, it has four water filter holes so it won't collect water - the mold won't grow. And it won't fall apart.