A three-pack of super-soft replacement brush heads for the ultra-sleek M Sonic Toothbrush. These brush heads are made with soft DuPont Nylon bristles to deliver effective-yet-gentle cleaning that lifts away stains and removes plaque. For best results, Dr. Marashi recommends replacing your brush heads every three months. - Gentle DuPont Nylon bristles. - Up to 10x more plaque removal than a manual toothbrush. - This package contains 3 brush heads and 3 protective travel caps.