1. The head ring fixing device effectively limits the rotation of the head and ensures the fixation of the cervical spine.
2. The occipital control device is maximally suitable for various occipital shapes.
3. The occipital fine adjustment device can finely adjust the occipital height along the oblique 15 degree trajectory.
4. The height control structure of the chest compression piece can adjust the height of the back chest compression piece according to the patient's body shape.
5. The occipital height control device can control the height of the occipital bone support until the occipital bone is supported.
6, the jaw height control device can control the height of the lower jaw until the lower jaw is supported.
7, detachable thick breathable lining, make the wear more comfortable, and can be cleaned.