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ProLock is an exciting new texturized polyester thread (DTY) designed for serging on fleece, knits, and stretch fabrics. Available in 73 colors, ProLock is colorfast and can be commercially laundered without risk of fading. With the bulk, elasticity, and flexibility popularized by “woollie-like” nylon threads, ProLock has all these traits plus the addition of a higher heat-resistance.

  • Available in 73 colors.

  • Tex 35 Texturized Polyester thread. Created specifically for Serger and Overlock machines.

  • ProLock is a strong Textured Polyester thread with great coverage and is widely-used for serging applications where stretch isn't critical.

  • ProLock is resistant to chlorine which makes it the best choice for children’s clothing as well as swim wear and active wear.

Recommended Needle and Tension Settings

ProLock is designed to work in the loopers of a serger/overlocker.


What Our Customers Say About Us

I am so pleased to have discovered Bottom Line! I use no other thread on my bobbins . Because it is so thin I can pack a lot on the bobbin so I'm not always running out as I did with other heavier thread. My Berninas love Bottom Line too: no knotting, snarling ,breaking or lint. Having made over 600 quilts I like discovering great products such as Bottom Line.

a.s.