Includes Britax Convertible Car Seat Cupholder Cool Grey & Car seat ClickTight Installation System is the safest and simplest technology on the market. Open the front of the car seat, feed the seatbelt through the indicated path and click the seat shut. That's all you need to do for rock-solid installation. SafeCell Impact Protection is a safety system including a steel frame, energy-absorbing base and patented V-shaped tether. Side Protection, formed by a deep energy-absorbing shell, shields your child from the most severe type of collision.Britax