Apolo Shampoo Brush is made of ABS plastic and eco-friendly food grade silicone, no battery required. Perfect for various hairstyles, no matter wet or dry, even to groom hair of your pets. Massaging your scalp in the shower to ease itchiness and promote blood circulation. Getting a relaxing massage at home and every time you wash your hair. Ergonomic design perfectly fits in your palm and is easy to hold with only 2.6 oz. Use it and enjoy the fun of massage at home anytime!