Babies that wear helmets are usually going through helmet therapy or helmet orthosis. Also known as cranial orthosis, helmet therapy is a painless, non-invasive treatment where a baby's head is fitted with a special helmet to correct the shape of the skull. A baby helmet is custom-made to hold the baby's head comfortably and guide the head growth by applying controlled pressure on specific areas. The treatment is effective when started early, within the first few months of a baby's life.