Leather is a non-perishable animal skin that has been denatured by physical and chemical processing such as hair removal and hiding. According to animal types, there are mainly pig leather, cow leather, sheep leather, horse leather, donkey leather and kangaroo leather, and a small amount of fish leather, reptile leather, amphibian leather, ostrich leather and so on.

Animal leather is a kind of natural leather, that is, we often say genuine leather. It is a leather material made of animal (rawhide) after being processed by tannery, which is made of various characteristics, strength, feel, color and pattern, and is an essential material for modern leather products. Synthetic leather is a plastic product that simulates the composition and structure of natural leather and can be used as its substitute material. The surface is mainly polyurethane, the base material is polyester, cotton, polypropylene and other synthetic fibers made of non-woven fabric. Both the front and back sides are similar to leather and have breathability. It is characterized by beautiful luster, not easy to mold and moth, and closer to natural leather than ordinary artificial leather.