Nano Bristle Tooth BrushMulti duty: The soft bristles of the toothbrush help you prevent teeth recession from aggressive brushing, with a comprehensive cleaning function, also suitable for tongue cleaning. 20,000 Soft bristles: more than 20,000 pretty soft micro nano bristles penetrate the sulcus of the teeth and the gum line, deeply and smoothly clean the teeth and remove the filthy without hurting the tooth enamel. Powerful Function: Ultra soft or small toothbrushes make