DMC Light Effects thread is a glistening metallic thread that will add reflective qualities and sparkle to any needlework or craft project. Made from 100% polyester fibers, Light Effects floss is comprised of six size 25 easily separated strands. Light Effects uses a color numbering system that easily corresponds to the popular cotton DMC embroidery floss. You can add a subtle highlight to your stitching by combining one strand of cotton Floss with one strand of Light Effects. Or for a more vibrant look, you can substitute Light Effects for its matching shade in cotton floss.