These Oral-B iO Gentle Care Replacement Brush Heads are engineered to deliver a superior clean while ensuring gum comfort. Compatible exclusively with the Oral-B iO rechargeable electric toothbrush series, these heads feature soft micro-vibrating bristles designed for a delicate yet thorough brushing experience. Optimal for individuals with sensitive gums or those seeking a gentle yet effective cleaning routine. Replacing your brush head regularly—typically every three months—ensures you maintain the highest standard of oral hygiene performance your toothbrush can offer.