Featuring superior convenience, best-in-class in safety, and premium comfort the Pinnacle ClickTight is quite simply the best Harness-2-Booster Seat that Britax makes. With the revolutionary ClickTight Installation System, now everyone can install the car seat securely and confidently by just buckling the seat belt. You simply squeeze the release button to open, buckle the seat belt across the belt path and then click the seat shut for a proper installation every time - no shoving, kneeing, or yanking required. SafeCell Impact Protection surrounds your child in safety components that work together to protect well beyond the established federal safety standards. And complete side impact protection max delivers Britax's highest level of protection featuring cushions on the outside of the seat that maximize the absorption of crash forces and a foam headrest inside that keeps your child's head and neck extra secure.