The simple answer to that is: “its mostly donated clothing.” Most of it originally comes from the larger donation companies like Goodwill and Salvation Army while a smaller percentage comes from private donation companies and charities. These donation companies usually keep a small percentage of the clothing they receive to sell retail in their own thrift stores while selling off the vast majority of it to rag dealers who then resell the mixed used clothing by the container to different countries all over the world. Its also worth noting that American used clothing is a highly coveted world commodity due to many factors such as the popular brands, style, quality and the sheer quantity available.