Angled bristles for 90% deeper reach (than a regular manual toothbrush in laboratory testing). Superior clean. Trust the brand more dentists use themselves worldwide. Why is Pro-Health right for you? It's clinically proven to remove more plaque than a regular manual brush. It removes up to 90% of hard to reach plaque (based on single use brushing studies). Features: CrossAction Bristles: Unique CrossAction Bristles are angled in opposing directions to life out and sweep away plaque. PowerTip Bristles: 550 extra long bristles to help clean hard to reach places. Indicator Bristles: Blue indicator bristles fade halfway so you know when to replace your brush. Pro-Health Money Back Guarantee: If you are not satisfied with your results, please call 1-877-769-8794 within 60 days of purchase with UPC and receipt to receive a pre-paid card in the amount of the purchase. The dental experts from Oral-B recommend using Crest Pro-Health toothpaste. For more oral care information, visit www.OralB.com or call 1-800-56-OralB (1-800-566-7252). www.pg.com.