Designed by the world renowned physiotherapist Robin McKenzie, and from the best selling range of Original McKenzie Lumbar Rolls, the Original McKenzie Cervical Roll is designed to help a user relieve postural neck and shoulder pain whilst sleeping.Placed inside the users pillowcase, which keeps the roll in place to ensure the most beneficial effect, the Original McKenzie Cervical Roll, which is 510mm (20\"), provides the extra support required to reduce strain and thus reduce neck and muscle pain.