Hello Fauguoxou38
Thank you for your message.
You can take the folded matress with you on the train. The important thing is that it do not get in the way, do not pose a danger to other passengers and that you can transport them easily, as we do not offer assistance with luggage transport.
Door-to-door transport is only possible for baggage weighing up to 23 kg.
I wish you a nice evening.
Regards, GiorgiaB