Description In our expert opinion at The Perth Sewing Centre — KingStar Metallic Embroidery Threads are the BEST product on the market! The luminescent metallic embroidery threads by KingStar have a polyester core and are wrapped in rice paper with a metallic finish.  The high- quality thread doesn’t “”kink”” up as it unwinds from the spool and runs smoothly through the thread pre-tensioners, allowing fewer thread breaks and higher quality embroidery. Kingstar® Embroidery Threads – Kingstar® Metallic 3000m