Tracks wear on bristles. The brand more dentists use themselves worldwide. At Oral-B we care for your oral health by developing innovative products that are trusted by dental professionals worldwide. Indicator Bristles: Blue indicator bristles fade halfway so you know when to replace your brush. Comfort Fit Bristles: Comfortably curved for grooves between your teeth. Gentle End Rounded Bristles: Specifically designed to be gentle on teeth and gums. The dental experts from Oral-B recommended using Indicator with Crest toothpaste. ADA Accepted: American Dental Association. The ADA Council on scientific affairs Acceptance of Oral-B Indicator is based on its finding that the product is effective for removing plaque and helping to prevent and reduce gingivitis, when used as directed. For more oral care information, visit www.OralB.com or call 1-800-56-OralB (1-800-566-7252). www.pg.com. Made in the USA (with US and imported parts).