This kind of manually spun yarn (tsumugi yarn), which is naturally uneven, is used as either warp thread or weft thread, or both of them on weaving.
この紬糸を機織りの緯線・経線の片方若しくは両方に用いて織った布をいい、手撚りした糸（紬糸）の太さに均一を求めない。