Superior Education



Bottom Line is a 60 wt./2-ply polyester thread that has been designed to be used as a bobbin thread. It's fine diameter helps it to blend well and its filament construction makes it extremely smooth, so it glides through fabric when stitched. As a lint-free thread, you will find that the blending tones seem to disappear into colored fabrics, creating a nearly-invisible presence.

Bottom Line Thread FAQ

If you want an almost invisible thread, without going to a monofilament thread like MonoPoly, use Bottom Line colors #623 Silver or #620 Cream when sewing or quilting on light-colored fabrics. The use of these thread colors on light-colored fabrics provides an almost invisible effect. If you are stitching on dark colored fabrics, we recommend Bottom Line #617.

Yes! The Bottom Line thread is marvelous for machine stand alone lace embroidery and free standing lace. We recommend using Bottom Line in both the top and bobbin for this application. The finished design is soft and fine.

Absolutely. Many quilters will use Bottom Line as a top thread for stitch in the ditch and dense quilting. Even though Bottom Line has been designed to be used as a bobbin thread, it can (and should) be used as a top thread in many different applications.

Please view our Color Compatibility Charts. We've matched similar colors across thread lines and have created handy reference guides.

Most serger thread is on the cheaper end of the scale, using lower quality spun polyester fibers. This type of thread is OK (still not the best) to use with a serger where multiple strands overlock and form the stitch. A corespun polyester serger thread, like Sergin' General, is recommended due to its strength, tighter twist, and lower amount of lint. With that said, we do not recommend sewing or quilting with cheap serger thread because of its high lint displacement, lower strength, and looser twist. So Fine! #50 is not spun polyester, but multifilament polyester, just like Bottom Line.

Back to Top