Colgate Floss-Tip Charcoal Toothbrush, with charcoal infused bristles, is specially designed with 17x slimmer tip bristles for a deep and gentle clean*. The black toothbrush bristles help to sweep away food and plaque from along the gum line and in between teeth. This toothbrush, however, should not replace flossing. This soft toothbrush provides a gentle clean for sensitive teeth. *vs. regular end-rounded bristles