1. DuPont bristles, shiny and tough 2. U-shaped wrapping cleans the surface of the teeth, clears stubborn stains on the bulge, and cleans the gap between the teeth 3. The top is rounded to clean teeth and protect gums 4. Suitable for all series of Usmile electric toothbrushes 5. Difference between brush heads: PRO+/whitening/sensitive care -Bristle hardness: medium soft/soft/medium soft -Function: clean plaque / mild care / remove stains and brighten - Applicable people: daily cleaning people / sensitive first-time users / people with stains and yellow teeth
