"Double-boxing" refers to the practice of placing a shoe box inside another box before shipping it to the customer. This is done to ensure that the shoe box and its contents remain in pristine condition during transit. The outer box serves as an added layer of protection against potential damage from handling, weather, or other factors. This is often requested by sneaker collectors and enthusiasts who value the condition of their shoes. The term is most commonly used when buying or selling sneakers online or through mail-order. In this case, the seller will double-box the shoe before shipping it to the buyer to ensure that it arrives in perfect condition.