The Bottom Line #635 Medium Blue 1,420 yd. spool. 60 weight, 2 ply lint-free filament polyester thread, suitable for any type of sewing. This strong, yet lightweight thread is the ultimate in bobbin thread, and it's also perfect for hand and machine appliqué, English paper piecing, microquilting, binding, and can even be used for lace. The Bottom Line is available in 50 solid colors. Recommended needle: topstitch #70/10 needle.