quality assurance This is a two-layer cowhide, which is the second layer of cowhide that is cut horizontally into two or even three layers. Later, it is covered with PVC and PU materials for re bonding to make leather. It is suitable for making mid to low grade leather products, and looks very high-end. The appearance can be made very little like the first layer of cowhide, but it still maintains the characteristics of cowhide, with higher durability and strength than the first layer of cowhide Size issue: For leather shoes that are usually worn in size 40, it is recommended to buy this size 40. For sports shoes that are usually worn in size 40, it is recommended to buy this size 39