Sulky spun polyester bobbin thread is a light-weight thread used in the bobbin for quilting. This thread also works great for piecing small quilts and
Black Polyester Quilting, Machine Sewing Threads for sale
Light-Weight Thread - WAWAK Sewing Supplies
Sulky Bobbin Thread 475 yards 0010 White
Polyester Sewing Thread, Hercules Polyester Thread
Products — Page 4 — AllStitch Embroidery Supplies
Thread By Brand - Sewing Thread Brands - WAWAK Sewing Supplies
Sulky Bobbin Thread for Sewing, 1100-Yard, White : : Home
Light-Weight Thread - WAWAK Sewing Supplies
Gutermann Sulky, Ideal under bobbin thread for all machine embroideries * Very fine, supple and tear-resistant * Results in a first-class embroidery
Sulky Bobbin Thread
Thread EE Schenck Company
Thread
Embroidery Bobbin Thread
Sulky Invisible Polyester Thread - Clear - 2,200 yd. Spool