Aurifil's Monofilament allows your quilting to disappear, allowing applique, piecing, and other elements of your work to shine. Use with Aurifil 50 wt cotton thread in the bobbin and lower top tension, and a longer stitch for the best results. Monofilament can be ironed at 302 degrees F or 150 degrees C, at 320 degrees F or 160 degrees C the thread will shrink 2%, do not iron hotter. Aurifil Monofilament Clear Invisible Thread, 100% nylon, 1094 yds/1000 m. Made in Italy.