What is Car seat compatible?

Car seat compatible means a stroller frame takes the listed car seat models, usually through a brand or model specific adapter rather than a universal fitting. Babyzen lists Maxi Cosi, a single name, while Baby Jogger lists Graco, Britax and Chicco covering a longer set of makers. Check your exact seat model against the list, since a shared maker name does not always mean the frame fits every seat in that range.