This document discusses various types of infringement that can occur in the footwear industry. It provides examples of popular footwear brands such as Nike, Reebok, Adidas, and Puma that are often infringed. Infringement can include using other brand names, logos, or trademarks without permission. The penalties for infringement range from delisting products to blacklisting sellers. Popular footwear brands need to protect their intellectual property from illegal copying.