Whiter teeth starting as of day 1 by removing surface stains Only genuine Oral-B brush heads feature X-shape bristles that clean in areas that regular ones cannot reach for optimal cleaning efficacy Oral-B 3D White features unique polishing cup to remove surface stains Guaranteed fit with Oral-B electric rechargeable toothbrushes except Pulsonic & iO toothbrushes Brush head usage indicator: bristles turn from green to yellow reminding you when to change to keep 100% cleaning efficacy Oral-B is #1 brand most used by dentists worldwide with clinically proven results