Softly. Gently. Effectively. The brush head for Hydrosonic newbies. Super-fine Curen filaments. It's soft, it's gentle. It's great oral hygiene without compromise. Tried-and-tested: The CHS 200 Sensitive brush head is ideal for newcomers to sonic toothbrushes and people with particularly sensitive gums, yet still has an extremely high level of cleaning performance. Most commercial brush head bristles have a diameter of 0.2mm however our CUREN filaments are only 0.152 mm in diameter. , , Coupled with its hydrodynamic effect this brush can clean areas other filaments are unable to reach.