Oral-B CrossAction Electric Toothbrush Replacement Brush Heads with Xfilament, 10-packThe dentist inspired round brush head uses specially engineered X shaped bristles to surround each tooth and lift, trap, break up and remove plaque along the gumline. With Max Clean Bristles, your brush head will let you know it's time to replace it! Features: Get a superior clean with 6x more plaque removal vs. a regular manual toothbrush X Shaped bristles lift, trap and remove plaque MAXCLEAN bristles Bristles turn yellow when it's time to change