The Philips Sonicare HX6054/87 replacement brush heads are designed specifically for adults who need a gentler approach to oral hygiene. These S2 Sensitive heads feature extra-soft bristles and a sleek black color, allowing you to remove plaque effectively without irritating sensitive teeth or gums. Each pack contains four black, oval-shaped heads that fit securely onto any Philips Sonicare electric toothbrush handle. This design ensures a comfortable fit in the mouth, making it easier to reach different areas while maintaining a soft touch against the gumline.