Fancy yarn is a kind of yarn in special structure and appearance effect, which made by special fiber, equipment, process, spinning and dyeing method. The material can be polyester, nylon, mohair, wool, acrylic, rayon, cotton, silk, gold and silver thread and so on. Various fibers can be used alone or in combination with each other. Fancy knitting yarn is widely used in fashion clothes, shoe upper, scarf, hats and so on .