Holoshimmer metallic thread is a thin, flat, ribbon-like, (holographic) foil that is laminated with polyester, which makes it amazingly reflective so you can add the ultimate sparkle to all of your decorative projects. Sulky recommends using only on a vertical spool pin; set the top tension on a lower setting; sew slower; use the thinnest possible bobbin thread; hoop fabric tautly; stabilize properly; avoid stiff, coarse stabilizers and short, tiny stitches; and use a metallic needle with lubricant. Recommended Needle Size: 14/90, 14/90 Metallic or 14/90 Topstitch. Sulky Holoshimmer Metallic Thread, 250 yard, color #6046, Sulky Color: Multi Light.