This dog washing brush features gentle silicone bristles that dogs love. It enables a quick and thorough washing of a dog's coat. Gentle, soft silicone bristles are designed to reach all the way down to the skin for a thorough cleansing. The Paw Brush features a built-in shampoo reservoir, just unscrew top retainer ring and remove the bulb to fill with pet shampoo of your choice (sold separately). During use, push down on bulb at top firmly to dispense pet shampoo through the bristles. When not in use, place the product upside down to keep shampoo inside, preventing leakage.