Leather is a material made from the skin of animals, and there are many different kinds of leather. Roan is a type of leather that is made from the hides of cattle, sheep, or horses. Suede is a type of leather that has been buffed to create a soft, velvety texture. Retan is a type of leather that has been treated with oils and waxes to make it more durable. PATENT leather is a type of leather that has been treated with a glossy finish. Russia leather is a type of leather that has been treated with birch oil to give it a unique smell. Tooled leather is a type of leather that has been decorated with patterns and designs.