Find car seats and boosters at Target.com! The marathon clicktight convertible car seat is an excellent choice for getting your family where they need to go safely, comfortably and with so much ease. With our clicktight installation system, now everyone can install the car seat securely and confidently by just buckling the seat belt. You simply open the front of the car seat, buckle the seat belt across the belt path and then click the seat shut for a proper installation every time. 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 shields.