Abstract: An improved cervical collar comprised of an elongated neck encircling band, a chin support brace, a sternum and shoulder brace and an adjustment system secured to the sternum and shoulder brace and the elongated neck encircling band for adjusting the height of the sternum and shoulder brace in relation to the elongated neck encircling band. The adjustment system is designed to lock the sternum and shoulder brace in position preventing further extension of the sternum and shoulder brace in relation to the elongated neck encircling band as well as preventing retrograde movement of the sternum and shoulder brace in relation to the neck encircling band. The collar also comprises a positive alignment tracking system for maintaining the sternum and shoulder brace in parallel alignment with the elongated neck encircling band as the height of the sternum and shoulder brace is adjusted.