Russia leather is a type of leather known for its characteristic aroma, produced by tanning with birch oil. Synonyms of this type of leather include Russian leather, cordovan, and cordwain. Cordwain was a medieval term, meaning leather produced in Cordoba, Spain. However, over time, it came to refer to a leather of high quality, similar to Russia leather. Cordovan, on the other hand, is a type of leather produced from the hides of horses, particularly their hindquarters. This leather is known for its durability and is commonly used in the manufacture of high-end footwear. Despite their different origins, all these leathers are prized for their quality and often associated with luxury.