The Oral-B Sensitive & Gum X X-Filament Replacement Brush Heads advanced filament technology design was created to brush away plaque. This replacement brush head features extra soft bristles that give you a clinically proven superior clean* ideal for cleaning around your gums’ sensitive and inflamed areas. Oral-B’s Sensitive & Gum X Replacement Brush Head with X-Filament bristles is an ideal addition to your brushing routine by providing advanced cleaning. This dentist-inspired round brush head gives a tooth-by-tooth clean with specially engineered bristles to ensure optimal coverage on every tooth while continuing to provide a soft clean on the sensitive areas of your gums. Round cleans better* and new cleans best. A new replacement brush head removes more plaque than a worn one. This replacement brush head pack includes three genuine Oral-B Sensitive & Gum X Replacement Brush Heads with X-Filament bristles. The Oral-B Sensitive & Gum X Replacement Brush Heads are compatible with all Oral-B rechargeable toothbrushes, except for Oral-B iO Toothbrushes. Oral-B recommends brushing with Crest Toothpaste for optimal results. Do not use on children under age 3. Replace brush head every three months or sooner if brush head becomes worn. Oral-B: Trust the brand dentists use the most worldwide.***Vs. a regular manual toothbrush.**Based on surveys of a representative worldwide sample of dentists carried out for P&G regularly.