This poly-wrapped poly core thread is for high speed sewing and works well as a top or bobbin thread. As a Tex 30 (approximately 40 wt.), OMNI has been designed for multiple quilting/sewing/ serging purposes including longarm machine quilting, clothing construction, and machine sewing. The multi-filament polyester core gives OMNI superior strength while the wrapped spun poly allows thread to grab the fabric and create smooth, pucker-free stitches. 6000yds per cone, sold by the cone.