Leather is made from a hide. Each skin gives a unique picture of how the animal lived. During tanning, natural features cannot be removed such as insect bites, scars or dung stains.
These characteristics make the difference between a natural product like leather and synthetically manufactured materials. The latter will never be able to match the naturalness of leather. Leather is a waste product of the meat industry. In the furniture industry, we almost always use cattle hides because they are stiff and large.