Nike Air Force 1s are made from high quality leather, suede and other premium materials. Cheaper materials are often used in counterfeit shoes, which are noticeable upon close inspection:
Leather Quality: The leather on genuine Air Force 1s is smooth, soft and durable. Fake leather can feel stiff, plastic-like, or even too shiny.
Suede: If the Air Force 1 has suede elements, the texture should be soft and velvety. Fake suede can look rough, uneven, or lack the fine pile of real suede.
Smell: Authentic Nike shoes have a specific non-chemical smell. Counterfeit shoes, especially those made of synthetic materials, can have a strong unpleasant odor.