During the development of the Joolz Aer the expected maximum weight was 18 kg in the seat + 5 kg in the basket. Yet due to extremely solid construction we retested our product and even with a maximum weight capacity of 22 kg in the seat, the Joolz Aer complies to the EN1888-2 norm. We implemented this change on all artwork as of new productions. It might be possible the artwork on your Joolz Aer is still from before this change. No worries, also your Joolz Aer can stroll with a maximum weight of up to 22 kg!