So Fine! #50
#50/3-ply polyester thread. Designed for bobbin thread, quilting, and sewing. So Fine! #50 is a lint-free, matte-finish, smooth #50/3 filament polyester thread. Due to its fine nature, So Fine! #50 is an excellent blending thread and loved by both longarm and home machine quilters. Available in 134 colors, So Fine! #50 also makes a wonderful bobbin thread.