what is yarn made of

Yarn is a strand of material made from numerous natural or synthetic fibers and filaments. Fibers are short pieces of hair, while filaments are long strands of hair. Yarn can be made from a variety of different fibers, including both natural and synthetic fibers. The most common plant fiber used to make yarn is cotton, but other natural fibers such as bamboo can also be used. Alongside cotton, synthetic polyester fiber makes up the two most commonly used fibers. Animal fibers such as wool, mohair, angora, silk, cashmere, llama, alpaca, and qiviut (musk ox) can also be used to make yarn. Yarn can be made by twisting staple fibers together to make a cohesive thread, or "single". Spun yarns are produced by placing a series of individual fibers or filaments together to form a continuous assembly of overlapping fibers, usually bound together by twist.