Restricts cervical spine flexion, extension and rotation to promote patient recovery. The two-piece polyethylene design allows the practitioner to simply pull and turn the Dial to select 1 of 6 height settings. Adjusting the Velcro straps enhances the patient comfort and flex tabs on the front panel help disperse pressure along the sternum. The large tracheal aperture provides functional access for the airway management and other essential procedures. Contoured around the shoulder and mandible areas to increase stability and comfort. Removable, foam laminated pads wick away moisture to ensure proper patient hygiene and comfort while preventing skin irritation. X-Ray, CT and MRI lucent.