Replace-me bristles. Compare to Oral-B Indicator Contour Clean (Oral-B and Indicator are registered trademarks of the Procter & Gamble Business Services Canada Company). Green Replace-Me bristles fade with use to remind user to replace brush. Bristle trim shape is designed to clean all surfaces and reach deep between teeth. Ergonomic handle with no-slip grip for better feel and control. Quality end-rounded, polished bristles for gentle cleaning. Dentists recommend replacing your toothbrush every 3 months. Questions? 1-888-423-0139. www.topcarebrand.com. Quality Guaranteed: This TopCare product is laboratory tested to guarantee its highest quality. Your total satisfaction is guaranteed.