Leather is made from what layer of the dermis?

Leather is primarily made from the dermis layer of animal skin, specifically the reticular layer, which is the thicker, deeper part of the dermis. This layer contains dense connective tissue, collagen, and elastin fibers, providing strength and durability to the leather. The upper layer of the skin, known as the epidermis, is typically removed during the tanning process, leaving the reticular layer to be processed into leather products.