NHANCED CLEANING: Removes Up to 100 Percent more bacterial plaque for cleaner teeth and healthier gums vs. a manual toothbrush with Oral-B electric toothbrushes heads X-SHAPE BRISTLES: Only genuine Oral-B brush heads feature X-shape bristles that clean in areas that regular ones cannot reach for optimal cleaning efficacy DEEP CLEANING: Oral-B Floss Action features unique interdental bristles to reach deep between teeth and sweep away plaque with Oral-B toothbrush heads GUARANTEED FIT: Compatible with all Oral-B electric rechargeable toothbrushes except Pulsonic and iO models when using an Oral-B sensitive toothbrush head USAGE INDICATOR: Brush head usage indicator changes bristle color from green to yellow as a reminder to change the head, ensuring optimal cleaning efficacy with an Oral-B toothbrush head