spun silk; spun silk yarn; schappe
Technical term in textiles for silk yarn made from short fibers or waste silk, as opposed to filament silk. 'Schappe' is a European term for the same product.
Spun silk yarn is made by spinning short silk fibers.
Compound of 絹 (silk), 紡 (spinning), and 糸 (thread/yarn). The reading is on'yomi throughout.