DMC-Six-Strand Embroidery Cotton. A brilliant six-strand floss made from double mercerized long staple 100% cotton fibers. The floss is packed... DMC Stranded Cotton is The Worlds Favourite Embroidery Thread. DMC use the worlds finest long staple cotton and mercerise it twice to give your embroidery exceptional sheen. The 6 easily divisible strands allow you to vary the weight of your stitches to add depth to your project.