Yarn is a kind of textiles, with a variety of textile fiber processing into a certain degree of fineness of products, for weaving, rope making, line making, knitting and embroidery, etc., divided into short fiber yarn, continuous filament and so on. The fineness of the yarn can be expressed in many ways, such as number, metric number, Imperial count, Dan Neil, etc. (see count).
The twist of the yarn is indicated by the number of twists per metre or inch.
Wool yarns and yarns are generally used in textile sweaters, maoku, wool vests, scarves, hats and gloves and weaving all kinds of spring and autumn season apparel supplies, in addition to warmth and decorative effects.