The Oral B iO Series Kids Spiderman Replacement Brush Heads combine powerful but gentle micro-vibrations with our unique, dentist-inspired round brush head design for Healthier Gums in 1 week*. Designed exclusively for Oral-B iO electric toothbrush handles, Oral-B iO Clean & Gum Protect brush head is specially designed for gentle and effective cleaning on sensitive areas and gums. It has up to 4000 densely arranged bristles to clean sensitive teeth and gums thoroughly for healthier gums in 1 week*. Optimized bristle patterns adapt to the curves of each tooth to reach deep & remove more plaque even in back molars. Since dentists recommend changing your toothbrush head every 3 months for best results, Oral-B replacement brush heads feature color-changing bristles that fade from blue to white to signal when it's time to change. So you can get back to 100% Cleaning Power.<br>*vs regular manual toothbrush<br># oral-b # electric toothbrush # toothbrush # clean