The Oral-B Pro Sensitive Clean replacement electric toothbrush heads feature 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.Removes up to 100% more bacterial plaque for cleaner teeth and healthier gums vs. a manual toothbrushOnly genuine Oral-B brush heads feature X-shape bristles that clean in areas that regular ones cannot reach for optimal cleaning efficacyOral-B Sensitive Clean features a high density of extra soft bristles for a gentle and effective cleanGuaranteed fit with Oral-B electric rechargeable toothbrushes except for Pulsonic u0026 iO toothbrushes.