I heard from an Indian friend that it takes about 72 hours by train from the city to return home. It's not uncommon to have to wait for several hours to change trains, so I sometimes sleep on the platform of the station and wait. For this reason, people carry bedding that is wrapped around a thin futon-like fabric and fastened with a belt, spread it out on the platform or in the car, and fall asleep to relieve the fatigue of a long trip.
Inspired by this bedding, I created a foldable, compact, nomadic mattress that fastens with a belt. Make a cut in the upper part so that it can be used as a pillow when you put your jacket or valuables in it. The fabric is waxed to prevent moisture from the floor. The cover can be removed and washed, and as a result, I think that it has improved by several steps from the Indian one, including practicality. It should be enough bedding to keep in your car or to use when you invite friends over.