All SISSEL® orthopaedic pillows feature a substantial support to the lower cervical spinal column. As a result the entire shoulder and neck region are well-supported. Due to its unique angle, the pillow fits in between the shoulder and cervical spinal column, filling the space between, supporting the neck and gently leading the spinal column into the anatomically correct position. A slight stretching effect on neck and spinal column might make the change feel unusual at first. Your body will require a little time (2 to 14 nights) to once again get used to a healthy natural sleep. Once you are used to your Sissel pillow you will not want to be without it.