Yarn Grading: I frequently check with grading technical specs, which involve the diameter and uniformity of yarn strands. A consistent diameter presents improved visual appearance and performance of fabrics. Elasticity，sturdiness，breathability，flexibility，form retention，good dyeability，light-weight These technological parameters not merely reveal why spandex-covered yarns are cr... https://smoking-thread10975.blogchaat.com/31742472/covered-spandex-yarn-things-to-know-before-you-buy