V design, USES the high quality soft brush head, small brush head design at the back of the mouth clean teeth, effective cleaning treatments and in the process of orthodontic teeth specially designed non-slip handle, v-shaped design effective cleaning treatments and in the process of orthodontic teeth, USES the high quality soft brush, through advanced technology grinding processing, can better protect the gums, small brush head address design, more easy to clean the back teeth, brush handle radian design unique, full of elasticity