Oral-B iO Refills Gentlecare (2 Pack)Key Features Gentle care adapts precisely to the curvature of the tooth and gum line for a gentle and effective cleaning For gentle and effective cleaning on sensitive areas and gums The bristles are carefully arranged on the typical Oral B round head to better surround each tooth for optimal cleaning Dentists recommend changing the brush every 3 months for optimal cleaning Exclusively designed and guaranteed for your Oral B iO