Product Description "A toothbrush for periodontitis prevention that scrapes away dirt at the gum line while simultaneously massaging the gums." - The ultra-fine bristles in the center remove dirt at the gum line (cleaning the border). - The high-density bristles on the outside massage weakened gums with moderate stimulation. Ingredients and Components - Handle material: Body/Polypropylene, Rubber part/EPDM, Polypropylene - Bristle material: Nylon/Saturated Polyester Resin - Bristle hardness: Medium - Heat resistance: 80 degrees