Leather made from the inner layer of horsehide. IT is the most non-porous leather known and is characterized by its waxy finish. It possesses a very fine grain.

From a section of a hide called the shell.

Leather made from the tight, firm shell portion of horse butts - has very small pores and is very durable.

a fine leather originally made in Cordoba, Spain

Leather from a horse's posterior. When tanned it becomes a rich black cherry color; so it has evolved into common usage as a color name.