Leather is a material with extended features and multiple levels of quality and rating attributes. It is a natural product and as such, natural defects are to be expected. Wrinkles, scars, insect bites, different fibre structures and brands are part of this natural product. While some of these defects are very obvious and can be easily detected, others need to be looked for more carefully. Since leather accounts for the largest cost of a shoe, optimizing its use is the key to achieving the economic goals of manufacturing.