What thread should I use to sew stretch fabric?

Avoid overly rigid or cheap synthetic threads - they'll snap when the fabric stretches. You want a specialized elastic thread for stretch, or failing that, good-quality polyester thread that has some flexibility to it. You can also use regular thread with a stretch needle and adjust your machine tension, but honestly elastic thread is still the most reliable solution if you're sewing stretch regularly.

The guys are right about the quality, but here's something people often forget: lower your machine tension 🧵 With stretch fabric, if you keep the tension normal, the thread will break or create weird loops. Turn it down a notch or two, test on a scrap, and your seams will stretch with the fabric instead of snapping the second it moves.

Quality polyester thread is definitely the foundation, you're right about that. But what nobody's mentioned: try a stretch needle (size 75/11 or 90/14), it makes all the difference. A stretch needle has a larger eye and a special groove that protects the thread, so you get way less breakage and skipped stitches. Combine that with lowered tension and you should be golden.

You're gonna have to check your machine tension first and foremost, otherwise no thread in the world is gonna save you. I learned that the hard way trying to sew a stretch legging with standard settings - it was a disaster, loops everywhere and the thread kept snapping. Once I lowered the tension by a notch or two and tested it on a scrap of fabric, everything sorted itself out.

That said, thread quality really does matter. Decent polyester like Gutermann holds up way better than cheap stuff that's gonna tear the second you stretch it. But if you want something really solid, check out specialized elastic threads - they've got built-in flexibility that helps a ton. And like someone already mentioned, a stretch needle (75/11 or 90/14) makes a huge difference too, a regular needle creates micro-snags that wear out the thread.

The winning combo is: reduced tension + quality thread + proper needle. Do a test run first on a scrap of the same fabric before you jump into your actual project.

I wouldn't really say it's about which thread to pick - it's more about how you use it. You're right about quality and stretch needles, but what really changes everything is the tension combined with your stitch type. I went through a lot of frustration before I figured this out: if you use a standard straight stitch on stretch fabric, even with the best thread in the world, you're gonna have problems. Try a really tight zigzag stitch or honestly just an elastic stitch if your machine has one - it gives the fabric room to move after you sew.

And then there's this really simple thing that works well: grab a thread that's one weight thicker than usual. Size 40 instead of 50, for example. Sounds dumb but honestly it breaks way less under tension. Combined with lowering the tension like you were told, you're gonna see a huge difference. After that yeah, Gutermann or Coats is quality stuff, but even decent polyester can work if you adjust your machine to what you're doing.

I struggled with stretch fabric for months thinking it was just about the thread, but it's really the needle that makes all the difference - I switched to a stretch needle and suddenly my seams hold without breaking. Then you combine that with decent polyester thread like Gutermann, and you lower the tension by a notch or two, and honestly that's the winning combo. All three things together, not just one on its own, or you'll still run into problems.