ZenyumSonic Gentle Clean Brush Heads 2-Pack (Black/White/Pink) :Slim, soft bristles: Massages gums while cleaning tight spaces between teeth. U-shaped brush contour: Adapts to the curves of teeth and gums for a gentler, more efficient clean.0.101mm bristle thickness: 34% slimmer than our regular brush heads.Textured tongue cleaner: Ensures a more thorough clean when brushing. Flexible brush neck: Reduces pressure on gums. --:Step 1: Attach the Gentle Clean Brush Head to your ZenyumSonic toothbrush handleStep 2: Align the bristles of your Gentle Clean Brush Head to face the frontStep 3: Press the brush head down firmly in place : Use the Gentle mode on your ZenyumSonic toothbrush for a better brushing experience. To keep your smile in tip-top shape, replace your brush head every 3 months, or anytime the bristles become frayed. Now, experience a gentler clean with ZenyumSonic Gentle Clean*! Power up, your way. *Compatible with ZenyumSonic electric toothbrush :Issues or concerns? Contact us through chat and click on Shop Agent