The Oral-B Floss Action replacement brush head provides superior, comprehensive oral hygiene. Its bristles clean the surface of the teeth, while specially designed MicroPulse bristles reach deeper to clean even hard-to-reach interdental spaces. Thanks to CleanMaximiser technology, the indicator bristles gradually fade to let you know when it is time to replace the brush head. Compared to a manual toothbrush, it removes up to 100% more plaque.