Gibaud neck collars (C1, C2,...) have been designed to treat certain conditions while providing a high level of comfort.
Soft C1 collars: Torticollis, acute flare-up of osteoarthritis of the neck
C2 collars with removable rigid insert: Torticollis, cervicobrachial neuralgia, acute neck pain.
C1 collar: Anatomical shape
C2 collar: Removable rigid insert. The anatomical shape increases the contact area and the immobilisation.