Specially designed for sensitive teeth, this product has soft and non-irritant bristles that go extensively into the gap of gums to clean teeth stains.The smaller head reduces discomfort, and helps to easily clean the oral corners.The higher density and convex-shaped bristles will bring you a more thorough cleaning experience. With the Bass brushing method*, the 45° inclined vibration around and under the gumline will help comprehensively remove food residue and soft dirt. The bristle is tested in accordance to FDA standard* and is safe to use.