As one of Oral-B's premium replacement toothbrush heads, the Sensitive Clean features ultrathin bristles that are gentle on gums, combined with regular bristles that are tough on plaque. Sensitive Clean removes up to 100 more plaque and reduces gum inflammation by 100 compared to a manual toothbrush. The unique combination of end-rounded and ultrathin bristles make Sensitive Clean ideal for everyone with a sensitive mouth and everyone. Oral-B Clean and Care Sensitive Clean Replacement Toothbrush Head, Pack of 4