Thread is the thing holding your clothes together. If it snaps, frays, or feels rough running through the machine, it can wreck a project you’ve spent hours on. And if you sew for kids or yourself, those clothes get worn, washed, stretched, and yanked overhead. Your thread has to handle actual life.

Poor quality thread causes a lot of problems most sewists don’t trace back to the thread itself. Seams pop the first time a garment gets worn. Stitches skip because the thread isn’t feeding smoothly, which throws off your machine’s timing. Lint builds up in the tension discs and bobbin area over time. Seams pucker on lightweight fabrics because the thread is being stretched as it feeds through. And rougher threads can feel scratchy against the skin, which matters a lot if you’re sewing for yourself or kids with sensory needs.

A couple of weeks ago my mum rang me in a panic. She’d just changed the thread in her overlocker’s upper looper, and it kept snapping within minutes of rethreading. I told her to swap it for a different cone. Sorted instantly. The thread had either degraded over time (she uses a cheaper brand) or there was a weak point in that particular cone. Either way, the thread was the problem.

How to choose the right sewing thread: what makes Rasant work

Rasant is a poly-core cotton thread made by Mettler. Polyester core for strength, cotton wrap for a soft, matte finish. That combo is exactly what works for garments: durable enough to handle stretch and wear, but the stitches sit soft and don’t look shiny or plasticky on the right side.

I started using it because it was good value. Thousand-metre spools, a huge colour range, and a lower price point than other premium brands. Thread is a repeat purchase, so that adds up fast.

What kept me using it was how it actually sews. Slow or fast, it feeds evenly, doesn’t fuzz, and the tension stays predictable. I’ve had the odd bobbin nest, but always because I didn’t thread the machine properly. A quick rethread fixes it every time.

In my overlocker, I colour-match to the fabric and put the matching cone in the left needle (the one whose stitches show through on the right side of a seam). Clean edges, no fluff buildup, neat stitches.

Quilters already use Rasant heavily for the same reasons: the matte finish looks beautiful, and it handles high-speed stitching without breaking. High-end fashion production uses poly-core cotton constantly for industrial machines and daily wear. So if you’re sewing at home, you’re using the same thread profile the fashion industry already relies on.

How Rasant handles knits, wovens, and leather

I sew across a wide range of fabrics: wovens, knits, French terry, softshell, swim, faux leather, and vinyl. Rasant handles every one without fuss.

On leather and bags, pair it with the right needle and a longer stitch length, and it glides through. I also use it as topstitching thread on bags and clothes by running two spools through the same needle to bulk up the stitch. Works beautifully.

Worth saying: thread is only one piece of the puzzle. You still need the right needle for your fabric, the right foot on your machine, and decent quality fabric. But good thread is the foundation, and a poor quality one will undo everything else.

Three years in, Rasant is still what I reach for first. You don’t need a drawer full of specialty threads to sew good clothes. One reliable thread that works across your projects will get you further than ten random cones from the bargain bin.