Add a sparkling edge to serged pieces with Halo, a polyester thread intertwined with strands of Metallic. Halo adds depth and glitz to any serger, bobbinwork, or couching project. Available in 36 beautiful color combinations. Some machines are able to run Halo through the needle for decorative topstitching using a Superior Topstitch #100/16 needle with very loose top tension and slower speed. When serging, put Halo in one or both loopers.