Say goodbye to guesswork! With iO refill technology, your brush head knows when it\'s time for a change. Watch the magic unfold as the color transforms from vibrant blue to pristine white, signaling when to it\'s time to change and ensuring a fresh and effective clean every time. The iO collection is Oral-Bs best technology. These replacement brush heads contain High Density Dentist-inspired extra soft bristles for a gentle clean. Optimized bristle patterns adapt to the curves of the teeth and gums but are extra soft for maximum comfort. Precision fit with a gentle clean. Compatible with Oral-B iO Electric Toothbrush Handles. Dentists recommend changing your brush head every 3 months for best results. You will receive 5 Oral-B iO Gentle Care Replacement Brush Heads. 4CT Ultimate Clean + 1CT Gum & Sensitive Black. Best of all, it is brought to you by Oral-B-the 1 brand used by dentists worldwide.* *Based on surveys of a representative worldwide sample of dentists carried out for P&G regularly. Do not use on children under age 3. Replace brush every 3 months or sooner if brush head becomes wor

• Remove 100% more plaque for healthier gums with Oral-B’s most advanced iO technology
• Achieve a 360° Advanced Deep Cleaning with perfectly angled dual-length bristles
• Thousands of bristles angled at 16° for superior plaque removal, spiraled pattern for better adaptability, dual-length bristles for hard-to-reach areas
• Oral-B’s signature round brush head with thousands of bristles adapts to your unique tooth shape for maximized cleaning efficacy
• Always know when to change your brush head to