The thread shrinks but The material does not, triggering a controlled puckering. The ensuing wrinkled result is beautiful and takes advantage of for it are limitless. No Unique iron or needles are required plus the embroidery could be sewn on any sort of embroidery machine. 1 spool for every pack. https://brookshvgpb.blogunok.com/32520572/a-secret-weapon-for-rubber-covered-yarn