We’re thrilled to unveil something truly special for garment makers, sewing enthusiasts, and serger devotees alike — Aurifil’s brand new Serger Packs, featuring our high-performance Forty3 thread in two versatile kit sizes. Whether you’re ready to dive in headfirst or just want a little taste, we’ve got you covered with both Full-Size (4 x cones at 3280 yards each) and Mini (4 x mini cones at 1170 yards each) kits.
These packs are more than just thread—they’re your gateway to discovering the full potential of serging with Aurifil’s 100% Cotton 40wt/3ply Forty3 thread.
So, What Makes Forty3 Perfect for Serging?
To understand that, let’s break it down.
Aurifil’s Forty3 is a game-changer. It’s one strand heavier than our original 40wt 2-ply thread, meaning we’ve added an extra strand of strength, durability, and performance. That third strand transforms this thread into a slightly thicker, tougher version of our beloved 40wt—ideal for the unique demands of garment sewing, topstitching, and serging.
Originally introduced in 2017, Forty3 was crafted to withstand the speed and precision of longarm quilting machines. But it turns out, that same strength and stability make it a dream for serging, too. It’s cross wound, spun from long-staple 100% Egyptian cotton, and is beautifully smooth with minimal lint—keeping your machines cleaner, longer.
Oh, and did we mention color? Forty3 comes in a stunning palette of 74 colors—including 28 variegated options. Every color is now easily spotted in our updated Aurifil Swatch Book, marked with a tiny yellow spool symbol next to the number.
Why Choose Cotton for Serging?
Let’s hear it straight from the makers:
🧵 Jenni Smith, Aurifil Designer
“I can’t imagine sewing a silk or lawn cotton blouse now with a polyester thread – it just doesn’t feel right. You want a thread that will wear at the same rate as your fabric, that behaves the same way. A polyester thread would outlive the length of a cotton garment and that’s not really what you want, you want the two to complement each other.”
🧵 Bhiravi Rathinasabapathi, Former Aurifil Artisan
“Looking at Forty3 and feeling it in my hands, I could immediately see that it was much stronger and sturdier than the normal Aurifil 40wt and 50wt that I was used to… If you’re sewing garments, I think it’s worth investing in a single cone for your sewing machine, or a set of 4 cones for your serger.”
🧵 Hilary Jordan, Aurifil Maker
“I always use 40wt thread when sewing garments because of its heavier weight, and the Forty3 has been a wonderful addition to my garment sewing arsenal. It’s so strong and can withstand the fast speeds of my serger!”
🧵 Maude MacDonald, Aurifil Artisan
“Cotton fabric and cotton thread shrink and wear at the same rate, which means your seams will age naturally instead of breaking down unevenly. This can make a big difference in the longevity of your handmade garments and quilts.” (keep an eye out for Maude’s guest post later this week!)
Cotton isn’t just natural—it’s smart. It moves with your fabric, breathes better, and delivers a finish that feels and looks right.
Why Two Sizes?
We know every sewist’s needs are different. Maybe you’re curious, maybe you’re cautious—either way, our Mini Serger Packs are a perfect entry point. Each mini cone packs slightly more yardage than a large spool of our classic 40wt 2ply, but in the shape and size your serger loves. It’s just enough to try it out, without the full-size commitment.
Ready to go all-in? Our Full-Size Serger Packs offer four generous cones of Forty3, each with 3280 yards of power-packed cotton goodness—perfect for your most ambitious projects.
Why Two Colors?
At launch, we’ve selected two soft, versatile neutrals designed to blend seamlessly into your handmade wardrobe—Sea Biscuit (6722) is a soft, warm off-white & Grey Smoke (5004) is a rich, deep grey. Think of them as the perfect base layers—quiet, capable, and oh-so-wearable. Love them? Let us know!
And don’t forget, our individual full-size cones are available in all 74 luscious colors, ready to bring your wildest sewing dreams to life. Be sure to check with your local quilt shop to stock up every color that your heart desires!
Time to Try It Out
Whether you’re a seasoned serger pro or just dipping your toes into the world of garment sewing, the new Aurifil Serger Packs are a must-have addition to your thread collection. Experience the strength, smoothness, and natural feel of Forty3—available now in mini or full-size.
👉 Available exclusively via Shop Aurifil.
👉 Learn more and explore color options in the Aurifil Swatch Book.
👉 Need a hand with your serger setup? Our Digital Marketing Coordinator swears by this post by Copper Creek Patterns.
Thread your serger with confidence. Thread it with Aurifil Forty3.
how does it work , is it something you load onto your own machine?