Britax Marathon Convertible Car Seat, Onyx
Britax marathon convertible car seat keeps little ones safe and comfortable during trips with this quality car seat that can be adjusted to two positions, rear and forward-facing depending on your child’s development. This features rear-facing position holds up to 33 pounds, forward-facing holds up to 65 pounds, patented versa-tether, comfortably fits larger and older children. These are removable, washable fabric cover. Patented Harness Ultra Guard System with belly pad for comfort and protection. Also built-in lock-offs. Sculpted base for a perfect fit. Flexible buckle latch system. Comfort foam and EPS protective foam. Tangle-free polyester 5-point harness. Belt holders keep belts aside for boarding. One hand recline adjustment.
The Roundabout is a better seat for boys than the Marathon
This is a good car seat, with some observations.
Older children may not fit into the Marathon, as the base is too tall and they’re likely to outgrow it in height way before they reach the 65 lb weight limit. In contrast, the Roundabout has a lower weight limit (to 40 lbs) and may be a better choice if you’re transitioning from an infant seat.
The Marathon seat is shallow and the crotch strap is too short, especially for toddler boys. The Marathon measures 6 inches from the back of the seat to the base of the strap. The Roundabout is deeper, 7 inches from seat back to the base of the strap, which is perplexing. Why would Britax make the larger seat shallower, if it has to fit both infants and older children?
