Description Oral-B IO Gentle Care 3 Replacement Brush Heads, specially designed to provide a professional clean feeling every day. Combining powerful micro-vibrations with a unique round brush head inspired by dentists, these brush heads ensure optimal removal of dental plaque for clean and sparkling teeth. Featuring up to 4,000 soft strands and an outer ring of pressure-absorbing strands, they adapt precisely to the curvature of the teeth while protecting the gums. In addition, the color-changing bristles signal that it is time to replace the brush head, thus providing optimal performance at all times.