As one of Oral-B's premium brush heads, CrossAction has perfectly angled bristles that purposefully attack and remove up to 100% more plaque than a regular manual toothbrush. Oral-B’s enhanced CrossAction toothbrush heads are developed with CleanMaximiser technology, which colors green bristles yellow when it's time to replace the brush head, to ensure the best results from the brush head and the best toothbrushing. The unique bristles reach deep between the teeth to remove plaque and leave the entire mouth cleaner than with a regular manual toothbrush. Can be used with all Oral-B handles except Pulsonic & iO.