The shoulder strap conforms to the baby's body shape design, and the comfort is not tight. The baby's head is in contact with the baby, and the baby is easy to accept. When falling, it effectively relieves the impact and protects the back of the baby's head. The careful corner treatment is not deformed and more durable. Adjustable size, soft and flexible material, protects the baby's head and back when cushioning impact. (Children are easy to fall before they are able to walk independently, in order to protect the baby's head. The necessary choices for the department) The baby who does not want to bring a hat does not resist the need to take care when traveling.