The thread shrinks but The material won't, triggering a controlled puckering. The resulting wrinkled effect is gorgeous and employs for it are limitless. No Specific iron or needles are necessary along with the embroidery could be sewn on any type of embroidery equipment. A single spool for each pack. 220 https://beckettbvman.bloggerswise.com/39412473/detailed-notes-on-double-covered-yarn