• Exclusively compatible with Oral-B iO electric toothbrush handles. • The Gentle Care brush head features 4.000 soft filaments for a gentle and effective brushing. • Round head design inspired by dentist tools for a professional clean feeling. • Helps remove up to 100 % more dental plaque than a conventional manual toothbrush. • Includes an outer ring of pressure-absorbing filaments to adapt to the curvature of teeth and protect gums. • The filaments change color to indicate when it's time to replace the brush head. • Dentists recommend changing the brush head every 3 months for optimal cleaning results.