All-around Clean Sonicare ProResults snap-on electric toothbrush head Replacement brush head for your Sonicare electric toothbrush, with larger surface area and contoured bristles that thoroughly clean and massage teeth and gums. Designed to optimize performance Reminder bristles ensure you are getting an effective clean Thorough clean feeling in your mouth Brush head design maximizes sonic motion Contoured bristles fit the natural shape of your teeth Angled, radial-trimmed bristles expands the area covered A brush head that fits multiple handles Snap-on brush head Easy brush head placement and handle cleaning Angled radial-trimmed bristles The curved surface area created by angled, radialtrimmed bristles helps maintain contact with the surfaces of the teeth and gums as the brush head pivots, covering a larger surface area without increasing the size of the brush head. Contoured bristles These Philips Sonicare electric toothbrush bristles are trimmed in a contoured pattern to fit the natural shape of teeth. The peaks and valleys along the length of the brush head are ergonomically designed to follow teeth topography and fit in between teeth so you're less likely to miss places when you brush.