These Philips Sonicare S2 Sensitive Genuine Replacement Toothbrush Heads are engineered for a superior clean. Designed specifically for users seeking a gentler brushing experience, they feature soft, contoured bristles that effectively clean teeth and massage gums. Achieve optimal oral hygiene results by replacing your brush head every three months, or sooner if the indicator bristles have faded. These genuine heads ensure compatibility and performance consistent with your Sonicare device.