It provides superior comfort and support to the neck through anatomical designed. There is soft polyethyleneIt support on neck. It refrains from excessive cervical activity and provides extra warmth around the neck. Compatibility MR. Indications Cervical disc hernia Muscle injuries Cervical arthrotis Muscle spasms Post-traumatic degenerative changes of the cervical spine SIZE PRODUCT HEIGHT(CM) NECK CIRCUMFERENCE(CM) XS 7 22-27 S 8.5 28-33 M 9.5 34-39 L 10 40-45 Declaration of Conformity CE