The other day, a wallet lay on my workbench that a customer had brought in for repair – not from KATAAB, but a mass-produced item. The seam was torn in one spot, and as often happens with machine stitching, the entire thread had unraveled over three centimeters. A single cut – and the whole seam gave way. That's the difference we make every day in our Berlin workshop.
What the workbench shows
Anyone who enters our workshop in Berlin sees at first glance: there's no rush here. On the heavy wooden workbench lie saddle needles in two sizes, spools of waxed linen thread, and a stitching pony – the wooden clamp that holds the leather in place while sewing. Beside them: an awl, with which each stitch hole is individually pre-punched before the first needle passes through.
Hand sewing is slow. For a single wallet, the stitching alone can take twenty to thirty minutes, depending on the seam length and leather thickness. No machine sits here. No automatic system pulls the thread through. Just two hands, two needles, and a piece of leather that is meant to hold this connection for decades. What remains on the workbench when the finished piece leaves the workshop is the knowledge: this seam won't simply give way.
Saddle stitch – the mechanics behind longevity
To understand why the saddle stitch is so durable, it's worth pausing for a moment to consider the technique. Because it's not just about something being "handmade" – it's about a fundamental mechanical superiority over what industrial machines can achieve.
How the machine stitch works – and why it fails
A sewing machine works with two thread systems: an upper thread that is fed through the fabric from above, and a bobbin thread that comes from a bobbin in the hook. The two threads interlock below the material to form a lock stitch. The problem: if this thread frays or tears at a single point, the entire seam begins to unravel – like a zipper that is opened at one end. Damage propagates.
Furthermore, a sewing machine can only sew leather with limited pressure. Too much pressure damages the fibers; too little leaves a loose seam. The result is often a connection that looks good visually but, under daily stress – opening and closing, pressure in the pocket, the weight of coins and cards – eventually gives way.
The two-needle technique of the saddle stitch
The saddle stitch works fundamentally differently. Here, two saddle needles are used, one at each end of the thread. Both needles guide the same thread through the same pre-punched hole – but from opposite sides. Needle one goes through the hole and pulls the thread halfway through; needle two follows through the same channel and interlocks with the first thread on the other side. Then it's pulled – firmly, evenly, controlled.
The result is not a loop, but an X-shaped lock within the leather. Each stitch is self-contained. If the thread is damaged at one point, only that single stitch comes undone – the rest of the seam remains completely intact. That's the crucial difference: the saddle stitch never fails in cascades.
Thread material and tension: two underestimated factors
In addition to the technique, the thread material plays a central role. KATAAB uses waxed linen thread – a material that has been used in saddlery for centuries. The wax penetrates the pores of the leather during sewing and glues the thread to the material. Thread and leather literally become a single layer.
Synthetic threads made of polyester or nylon – as often used in industrial production – do not adhere in this way. They lie in the leather, but they don't bond with it. That makes a huge difference in long-term durability.
Added to this is the thread tension. With the saddle stitch by hand, you feel how tight the thread is – you can readjust with every single stitch. A machine always delivers the same, pre-programmed tension. On uneven leather, at corners, at spots with varying material thickness, this is a clear disadvantage of machine processing.
Why craftsmanship matters
The superiority of the saddle stitch is not a romanticization of bygone eras. It is measurable. Leather experts and saddlers consistently report that hand-stitched pieces, with the same care, last significantly longer than machine-made ones – often two to three times as long. This is not only due to the seam itself, but also because handcrafted pieces are more meticulous in their overall execution: every phase of production is viewed with the same eyes, touched by the same hands. Errors are immediately noticed and corrected – not only when the piece is already with the customer. At KATAAB, no piece leaves the workshop that we wouldn't wear ourselves every day.
The ethics behind it
Longevity is not just a virtue of craftsmanship – it is an ethical decision. A KATAAB piece that lasts twenty years is not a disposable product for twenty years. We exclusively use vegetable-tanned cowhide leather from European tanneries with a traceable supply chain. Vegetable-tanned leather is chemically optimally compatible with waxed linen thread – both age together, both develop a patina together, both become firmer over time.
Our packaging consists of recycled kraft paper and a reusable cotton bag – no plastic, no excess. The saddle stitch, the leather, the packaging: everything is designed to make a KATAAB piece last as long as possible. This is our understanding of sustainability – not as a marketing label, but as a logic of craftsmanship.
A moment in the workshop
A customer – Thomas, an architect from Prenzlauer Berg – brought us his old wallet a few months ago. Not for repair. Just to show it off. He had bought it from us seven years ago, a simple slim wallet made of vegetable-tanned leather. The surface had developed a dark and silky finish, and the edges had acquired a soft rounding that only comes from daily use.
"I just wanted to show you what it looks like now," he said. He meant it literally. No complaint, no request. Just the quiet joy of an object that had grown old with him.
We looked at the seam – all still intact, not a single stitch undone. The leather had slightly puckered around the seams, as happens with well-maintained vegetable-tanned leather: a sign that the material is alive and breathing. Thomas slipped the wallet back into his jacket pocket, nodded briefly, and left.
Such moments remind us why we work slowly.
"It doesn't look old. It looks mature – like a good tool that serves its purpose." – Thomas, Berlin
What would you ask the maker?
The saddle stitch is just one of many steps a KATAAB piece goes through before leaving the workshop. Have you ever sewn leather yourself with needle and thread – or are you interested in how that feels? Write to us in the comments or directly at info@kataabwerkstatt.de.
Next week, we'll look at another often-overlooked step: edge finishing. What happens after the leather is cut – and why this step says more about the quality of a piece than many other things.
Discover KATAAB
All our pieces – from slim wallets to key organizers to travel accessories – are hand-stitched with a saddle stitch in our Berlin workshop. Many models can be personalized upon request: with initials, a date, or a short message. Browse our entire collection or write to us directly: info@kataabwerkstatt.de
Frequently asked questions
- What is the difference between saddle stitch and machine stitch for leather?
- The saddle stitch uses two needles and a continuous thread that locks itself in each stitch hole. If a thread breaks, the rest of the seam remains intact. With machine stitching, the upper and bobbin threads connect through a loop – if this breaks at one point, the entire seam unravels.
- Does a hand-stitched leather seam really last longer?
- Yes. Hand-stitched saddle stitches last significantly longer than machine-made seams with the same care – often two or three times as long. The reason lies in the interlocking structure of the stitch and the waxed thread material used, which bonds with the leather.
- What thread does KATAAB use for the saddle stitch?
- KATAAB uses waxed linen thread. The wax penetrates the leather pores during sewing and glues the thread and material together. This increases tear resistance and protects the thread from moisture and abrasion.
- Can a torn saddle stitch be repaired?
- Yes, and that is another advantage over machine seams: a single torn saddle stitch can be specifically repaired without unraveling the entire seam. At KATAAB, we are happy to help with such repairs – just write to us at info@kataabwerkstatt.de.