Tri-Active Clean Deep action 49% better clean in hard to reach areas 1 57% better clean along the gumline 1 Up to 2x more filament bundles 2 Unique head with 3 precision cleaning circles and a wavy bristle cut for the better adaption to the tooth anatomy 2 Flex Zone and Ball Joint to help control pressure when brushing - removes plaque while being gentle on gums Ergonomic handle 1 In laboratory tests compared to a standard flat-trim toothbrush 2 compared to a standard flat-trim toothbrush.