Leather used in aircraft must meet strict flammability and fire retardancy of leather (flame resistance, smoke density, etc.) standards. The leather must be treated during tanning in order to meet these requirements. Such leathers are also used for helicopters.
To save fuel, aircraft leather is made extra light (light weight).
Typical aircraft leather.
Leather in a smaller plane.
The cleaning and repair of signs of wear on aircraft leather
Trains with leather seats
The railway companies also equip some trains with leather covers. In 2022, the German Bahn decided to switch from leather to fabrics in first class, which will probably lead to more cleaning effort because fabrics have to be cleaned much more laboriously than wipeable pigmented leather.
Leather in the first class of an express train.