The Oral-B Pro Whitening toothbrush removes 90% of surface stains for a whiter smile. This is due to the toothbrush head and its dual-flexing design combined with a unique Stain Eraser. The dual flexing sides are able to adapt to each of your teeth. This toothbrush also features power tip bristles to reach difficult-to-access areas behind back teeth. The Oral-B Pro Whitening toothbrush whitens teeth by removing surface stains including stains in hard-to-reach areas - along your gumline and between your teeth. This medium bristle toothbrush has end-rounded bristles that are gentle on teeth and gums. For the best results, change your toothbrush regularly. A new toothbrush cleans 95% better in hard-to-reach areas*. This pack of Oral-B toothbrushes include different colors of toothbrushes for households with multiple people or stocking up. Oral-B is the #1 Toothbrush Brand Used by Dentists Worldwide. *vs. one 3 months old; research with a flat trim toothbrush