The KODOMO KIDS TOOTHBRUSH SOFT & SLIM (3 TO 6 YEARS) is designed for children with a full set of milk teeth, helping them learn proper brushing techniques. It features special tapered, soft & slim PBT (Polybutylene Terephthalate) bristles that are gentle on gums while effectively removing plaque and food particles. The toothbrush also has a small head, a long, slim neck for reaching back teeth, and an ergonomic "Thumb Lock" handle for a secure grip.