BUILT TO GROW — For extended use, the forward-facing Chicco MyFit harness + booster car seat easily converts ... COMFORT FEATURES — The high back booster accommodates your growing child ...

However, once you get to the booster stage, an all-in-one seat in booster mode will be bulkier in your back seat than a seat ... a no-rethread harness, or an extended rear-facing weight limit.