Clicktight installation system ensures that everyone can install the car seat securely and confidently by just buckling the seat beltnSafeCell impact protection is an integrated system of safety components, an including impact absorbing base, tether and harness, an impact stabilizing steel frame, and complete side impact protection plusnSafeCell complete side impact protection max provides Britaxu0026#39;s highest level of protection: a deep protective shell that absorbs crash forces, an energy-absorbing headrest, and external cushions that compress to divert energy away from your childnAdditional limited-time savings reflected in current price. For ages 2 and up; 25-70 lbs. Features SafeCell impact protection. Impact absorbing base and tether. SafeCell complete side impact protection MAX. Integrated cup holders and storage. Measures 22.5W x 21D x 36H in..