So Fine #50 is a smooth, lint-free 50 wt. 3-ply polyester that looks like cotton - but without the cotton price! Available in 134 colours on economical 3,280 yd. cones this thread is gorgeous for machine quilting on a domestic, midarm or longarm. Can also be used for piecing or general purpose.

Bottom Line or So Fine #50 is recommended for the bobbin.

Recommended needle:

Topstitch 80/12 (Domestic machine)
#16 (MR3.5)(Longarm machine)

Recommended top tension:

4.0 - 5.0 (Domestic machine)
loose on top and bobbin (Longarm machine)

If you need to match So Fine #50 colours to Bottom Line, click here .

If you need to match So Fine #50 colours to Masterpiece, click here .

Watch Cindy Needham demo So Fine #50 thread: