Wonderfil 100wt Cottonized Soft Polyester Tone on Tone thread,  InvisaFil virtually disappears into the fabric. InvisaFil is perfect for stitch in the ditch, top & bottom thread, bobbin thread for delicate machine embroidery, use as top and bottom thread for couching, lace designs, hand & machine appliqué, quilting, long-arming, and excellent for fine fabrics. Strong, colorfast, and lint free, the thread is safe to iron.   InvisaFil is available in 60 colors on 2500m / 2,734 yard spools.