Featuring 12 spools of Silk Finish 40wt in high-quality storage boxes. SILK-FINISH COTTON 40, ideal for quilting, patchwork, and embroideryWith SILK-FINISH COTTON 40 you are buying the right sewing thread for your patchwork and quilting projects - as the high-quality, somewhat thicker thread made of 100% long-staple Egyptian cotton is ideal for creating beautiful decorative seams and embroidery patterns. With a subtle sheen made from 100% long-staple Egyptian cotton, the natural fiber is gentle on skin, feels soft, smooth, and silk-like. Mercerisation makes the stread very strong, heat resistant and gentrly reduces shrinkage. STANDARD 100 by OEKO-TEX certified; exceptional colorfastness guaranteed.