Aurifil Vari Mako Thread 50wt 1300m 3770 STONEWASH DENIM Made from Long Staple Egyptian Cotton. Ideal for detailed machine embroidery, red work, quilting, lace design and serging. This thread has really taken off with machine quilters and has been used in numerous award winning quilts. Long staple cotton gives this thread the strength needed for high speed machines. Cotton Mako is also merserized, giving it a sheen not found in most cotton threads.