Sensodyne Pronamel Medium Toothbrush is specially designed for tooth enamel care and teeth protection. This medium bristle toothbrush cleans better with less pressure (1). Featuring a DuoFlex neck, this toothbrush is specially designed to protect against overbrushing and prevent enamel loss. This Sensodyne toothbrush pack contains a total of four toothbrushes, giving you plenty to stock your bathroom, travel kit and more with oral care products. It is recommended that toothbrushes are replaced every 3 months. For optimal enamel protection, brush twice daily using a Sensodyne Pronamel toothbrush and toothpaste. (1) In laboratory tests compared to a standard flat-trim toothbrush.