Enjoy a more captivating smile with EasyFlex Flossing Bacteria Defense Replacement Brush Heads. Compare to Oral-B Floss Action Replacement Brush Heads. The flossing bristle design of the EasyFlex Flossing brush heads penetrate deep between teeth to help remove plaque (does not replace flossing) and provide a more effective cleaning that can’t be matched by a manual toothbrush. The Soft Bacteria Defense bristles help keep the brush clean for up to 3 months (inhibits microbial growth that may affect the bristles. The bristles do not kill bacteria in the mouth or protect you against disease. Always clean the product thoroughly after use). The Replace- Me bristles fade with use to remind you when to replace your brush head. These brush heads are compatible with most Oral-B electric toothbrushes. For optimum hygiene replace your toothbrush heads every 3 months.