Aurifil 100% Mako cotton 3-ply thread is made specifically to handle the rigor of today's high speed high tech longarm machines. It has all the versatility and lustrous color of the original 40wt, with the added benefit of extra strength. This thread is perfect for longarm quilting, but is also a star for garment sewing, bag-making, domestic machine sewing, and more. Don't worry, it's still virtually lint free. Recommended Needle Size: 90/14 or 100/16 Topstitching Needle (50wt or 40wt in the bobbin). 4.0 or 4.5 Longarm Needle (50wt or 40wt in the bobbin) Made of: 100% Cotton Recommended Use: Machine Embroidery, Quilting, Thread Painting, Decorative Stitching, Satin Stitching, Decorative Appliqué, Garment Sewing Thread Weight: 40wt Length: 3280yds