Pillow

https://cdn.brilio.net/community/community-news/2018/06/25/f6bc830b2bf418d679cdba73662a89f0/f6bc830b2bf418d679cdba73662a89f0-24-image_1529808058_5b2f04babefeb.jpg
You should also bring a pillow in order to travel back into a more comfortable. The condition of the body that many hours sitting in the condition will tend to be more easily tired. For that there is no harm if you bring a pillow to customize yourself as comfortable as possible during the trip.