Deep cleaning, yet gentle. Innovative dual core bristles have a strong base and <0.01mm ultra soft slim tips. Charcoal infused bristles gently reach 7x deeper below the gum line (vs. ordinary flat trim toothbrush) and clean 2.4x deeper in between teeth (vs. ordinary flat trim toothbrush) for superior plaque removal. Clinically proven to make gums healthier (vs. ordinary flat trim toothbrush). Advanced Brush Design. <0.01mm charcoal dual core slim tip bristle.