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From Loopwheel Tees to Heavyweight Waffle Sweaters: Inside Iron Heart’s Knitwear Range
I eased my way into Iron Heart in 2014. My first piece wasn’t jeans, it was a T-shirt, loopwheeled—at the time, I barely knew what that meant.
This was the time when knowing—or caring—how a T-shirt is knitted was proper forum-nerd territory. So I what you could do then; I went to the Iron Heart Forum. In a thread about T-shirts, forum legend Beatle had weighed in with this characteristically blunt advice: “go loopwheeled.” That stuck with me.


Today, every menswear publication worth its salt has a guide to loopwheeled tees. What was once a rabbit hole is now the starting point. So what comes after loopwheel?
For Iron Heart’s FW26 collection, the knitwear piece that first caught my attention is the new IHSW-86, which builds on the brand’s heavyweight thermal, but with sweatshirt details.
The New Sweater Starts With a Familiar Fabric
The new waffle sweater builds on the IHTL-1700. It’s made from a heavy, loosely knitted 100% cotton waffle with four-needle flat seams and a one-wash finish. But the ribbed collar, cuffs and—crucially—hem give it a different shape.
Adding a ribbed hem might seem like a small change, but it has a big impact on the silhouette. An open hem keeps even a heavy thermal looking like a base layer; ribbing at the waist pulls it in like a sweatshirt rather than letting it hang straight.



I’ve worn the lighter IHTL-1301 thermal, and as the knit relaxes with wear, the open hem can flare away from the waist. That’s why the ribbed hem on the IHSW-86 immediately make perfect sense to me.
Iron Heart told me they’ve had feedback from customers that the heavier IHTL-1700 waffle would make a good sweater, and the IHSW-86 feels like a natural answer to that: keep the familiar waffle construction, but change the finishing details enough to turn the thermal into a proper sweatshirt.
The Loopwheel Tee Is Still the Easy Way In
For anyone new to the brand, I still think a loopwheel tee is the easiest way in.
These days I wear the IHT-1610L, the longer-bodied version of Iron Heart’s 6.5 oz. loopwheel T-shirt. The cotton jersey is knitted in Wakayama on vintage circular machines running at low tension, and the tees are one-washed before they reach your doorstep.
For a T-shirt, 6.5 oz. is substantial without changing the basic job of the garment. It still behaves like a tee, which is why it remains such an easy introduction to Iron Heart.



That was true for me in 2014. I didn’t need to understand the brand’s denim, motorcycle roots or heavyweight reputation to understand a white T-shirt. I only had to put it on.
What has changed is the culture around it. Beatle’s “go loopwheeled” comment once pointed towards something relatively obscure and mystical. Today, it points towards the familiar part of the range.
The 11 oz. Story Started With Long Sleeves
Move beyond the familiar loopwheel tee, and Iron Heart’s knitwear starts to blur the line between T-shirt, thermal and sweater.
Haraki-san originally designed the IHTL-1501 as a long-sleeved tee, using an 11 oz. Japanese cotton knit that brings far more warmth and structure than a normal jersey.



Iron Heart now describes the 1501 as all three: a long-sleeved T-shirt, a thermal underlayer and a lightweight sweater. The IHT-1600 takes that same 11 oz. knit and cuts it as a short-sleeve T-shirt, giving you the same heft and heat retention in a much less expected shape.
For how I wear tees, the 1600 is too much to handle for me. But as an extension of the 1501 rather than the starting point, it makes much more sense.
Why the Sweatshirt Feels More Like Outerwear
Iron Heart calls the sweatshirt range “ultra-heavy,” and with good reason. This 14 oz. Japanese loopwheeled cotton fleece is knitted in Wakayama.
This is one of the places where the brand’s motorcycle background becomes tangible. Close-cut sleeves help reduce wind penetration, while four-needle Union Special flat seams keep the construction low-profile and sturdy.



I’ve worn the IHSW-10, and for me it lands closer to light outerwear than a normal hoodie. The two-way Universal zip is the detail that makes that clearest:
You can fasten it across the chest while leaving the bottom open, which gives more room to move and lets some heat out without opening the whole thing.
Beyond the Familiar Starting Point
If I were buying my first Iron Heart piece today, I could still imagine starting exactly where I did in 2014—with a white loopwheeled tee. It’s straightforward, easy to wear, and these days hardly an obscure choice.
The IHSW-86 is more interesting to me because it shows what happens after that starting point. The fabric comes from an existing heavyweight thermal, but a few deliberate changes make it look and wear like a sweater. A small move on paper, but a whole new proposition in reality.
The post This New Waffle Sweater Shows What Comes After Loopwheeled appeared first on Denimhunters.
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