Oral-B iO Ultimate Clean, 4 pc, Replacement brush heads unisex, The Oral-B iO Ultimate Clean replacement toothbrush heads help you to get the best results from your oral hygiene. Changing the heads regularly guarantees you are always cleaning your teeth as effectively as with a new brush. Characteristics: cleans teeth even in hard-to-reach places cleans teeth very gently easy to change brushes teeth more effectively than a manual toothbrush the brush head follows the shape of the tooth better than a conventional manual toothbrush does the round toothbrush head surrounds each tooth with precision removes up to 100% more plaque than a manual toothbrush How to use: Attach the replacement head to the appropriate brush and click into place. Replace the brush head regularly, ideally every 3 months.