The seat is not officially approved for use in aircraft and does not have a TÜV label "for use in aircraft". There is no confirmed information about aircraft approval for this child seat, and enquiries about this have so far gone unanswered. However, the seat is very lightweight, compact and designed for travelling, attaches quickly with the vehicle seatbelt and comes with a water-repellent carry bag, making it ideal for car journeys and other modes of transport, but is not certified for use in aircraft.

Probably not, the seat is quite straight. With our little one it still worked somehow, but his head also hung forwards from time to time.

Unfortunately, I don’t think so. There is no inbuilt harness. Children aged from six months old but under four years old must be secured in either a suitable and properly fastened and adjusted rear or forward facing approved child restraint with an inbuilt harness

yes

Yes, it is hand luggage size