Colgate slim soft charcoal has 17x slimmer tip bristles (vs ordinary end rounded bristles) specially designed to sweep away food and plaque from along gum line and narrow gaps between teeth. The soft bristles clean deep between and behind your teeth, reaching spots that regular bristles cannot reach, effectively removing germs. Its charcoal infused extra soft bristles remove plaque bacteria. Colgate is the no. 1 Toothbrush brand recommended by dentists.