Oral-B iO Series Ultimate Clean replacement brush heads combine gentle micro-vibrations with our exclusive round brush head inspired by dental tools for a professional clean feeling every day. Designed exclusively for Oral-B iO electric toothbrush handles, the Ultimate Clean heads help remove up to 100% more plaque than a traditional manual toothbrush, leaving teeth clean and bright. The Ultimate Clean head combines 4000 soft bristles with a soft outer ring to precisely fit the surface of the teeth and protect the gums. Since dentists recommend replacing the brush head every 3 months for best results, Oral-B replacement heads feature color-changing bristles, signaling when it’s time to replace them. Change it and restore 100% effective cleaning. Original Oral-B iO heads are durable, safe, and high quality. The only compatible with your Oral-B iO electric toothbrush. HIGH BRISTLE DENSITY: Oral-B Ultimate Clean replacement heads feature up to 4000 soft bristles for effective and gentle cleaning. COLOR-CHANGING BRISTLES: Oral-B replacement heads have color-changing bristles to signal when to replace the head to restore 100% effective cleaning. REPLACE EVERY 3 MONTHS: A worn toothbrush head makes cleaning difficult and does not help reach plaque between teeth. For superior cleaning, replace the head when the bristles wear out. EXCLUSIVE TO ORAL-B iO HANDLES: Change it and restore 100% effective cleaning. Original Oral-B iO heads are durable, safe, and high quality. The only compatible with your Oral-B iO electric toothbrush. DENTIST’S CHOICE: Oral-B, the most used toothbrush brand by dentists worldwide.