Yarn is a kind of textile, which is processed into a certain fineness product with various textile fibers, which is used for weaving, rope making, thread making, knitting and embroidery, etc., and is divided into short fiber yarn, continuous filament, etc.
The fineness of the yarn can be expressed in various ways, such as the number of numbers, metric counts, imperial count counts, deniers, etc. (see count count). The twist of the yarn is expressed in terms of the number of twists per meter or inch.
Wool yarn and woolen yarn are generally used for weaving woolen sweaters, woolen pants, wool vests, scarves, hats and gloves and weaving various spring and autumn clothing items, in addition to warmth, there is also a decorative effect.