The Oral-B Pro Sensitive Clean features extra soft bristles that are gentle on gums, combined with regular bristles that are tough on plaque. It removes up to 100% more plaque and reduces gum inflammation by 100% compared to a manual toothbrush. Oral-B genuine brush heads are designed with new X-shape bristles that clean in areas that round ones cannot reach. Its brush head usage indicator turns bristles from green to yellow showing you when to change for 100% cleaning efficacy. Guaranteed fit with Oral-B electric rechargeable toothbrushes except Pulsonic & iO toothbrushes.