Oral-B Pro-Health CrissCross Ultra Thin Toothbrush Extra Soft reaches deep along the gum line. Oral-B® CRISSCROSS ULTRATHIN™ EXTRA SOFTDeep reach Along Gum Line 1. CrissCross® bristlesExtra Soft CrissCross® bristles are angled in opposing directions to lift out and sweep away plaque. 2. <0.01mm Ultrathin bristle tipsDesigned for gentle gum line cleaning. 3. Ultrathin bristles reach up to 2x deeper between teeth^^vs regular, flat trim bristles. Based on laboratory testing. Oral-B®, #1 Toothbrush Brand Used By Dentist Worldwide.**Most used by dentists based on surveys of a representative worldwide sample of dentists’ usage carried out for P&G continuously. Replace brush every 3 months. Clinical research proves that a new toothbrush can remove up to 30% more plaque than one 3 months old++Research with a flat trim toothbrush