When you raise the Extend2Fit Convertible’s headrest height, the harness straps change automatically along with it—no dismantling and rethreading required. Simply just squeeze the lever at the top in the seat and pull up or push down. Movie: Michael Hession Clek has good videos on line for the way to https://flenzy.store/high-performance-adjustable-racing-seat-universal-fit-black-red-pvc-leather/