Full-size rear seat for child too young to use the rear bench seat and the standing platformEasily installs onto the existing rear bench seat and stroller frameMulti-position recline, 5-point harness, and folds up with the strollerCompatible with Caboose Graphite, Caboose Ultralight Graphite or Big Caboose Graphite models only. This seat will not work with prior Caboose modelsMinimum age 6+ months, max weight: 45 lbs.