This sturdy 6-ply 100% rayon thread by Wonderfil is comparable in weight to a #8 perle cotton. Razzle's natural bright lustre and silky feel make it a wonderful choice for crafts, crocheting, knitting, and accessories. Razzle? can even be used in highlighting the details in dimensional stitches. Can be used for bobbin work, serging and couching, but is not recommended for machine sewing. RZ996