The Boulevard ClickTight features the revolutionary ClickTight Installation System, leaving you with no doubt the seat is correctly installed. It's as simple as buckling a seatbelt. Just open the front of the seat, feed the seatbelt through the indicated path, buckle it, click the seat shut, and secure the tether. Britax Boulevard Clicktight Arb Convertible Car Seat Kids Baby - Baby - Baby Gear