DESIGN FEATURES: Scalp massager shampoo brush made of upgraded silicone material, super soft, it can deep clean your scalp and remove dead skin without damaging your scalp, no matter it is used wet or dry. Manual operation, waterproof, no battery required, makes it done anywhere, anytime. HEALTHY AND PORTABLE - The scalp shampoo brush can deeply remove dandruff, exfoliate, dandruff, stimulate scalp blood circulation, relieve itchy scalp, and get a relaxing massage every time you wash your hair.