It is a toothbrush that has been designed for people with tooth sensitivity. Receding gums and enamel erosion can be caused by brushing too vigorously, which over time can lead to dentin exposure and tooth sensitivity. The brush has filaments that flex on contact with the teeth and gums to ensure gentle cleaning. The outer bristles of the brush are tapered so that the tips are even more flexible and protect teeth and gums from overly hard brushing. It is a toothbrush that protects against too vigorous brushing.