When can I start using the Joolz Hub seat, instead of the cot or cocoon?

The cot and cocoon offer more support to your babies back and neck and are suitable for newborns up to a maximum weight of 9 kg. When your baby can sit unaided it's time to switch to the seat unit, this is usually around 6 months. The seat unit can be used up to a maximum weight of 22 kg.