Waterproof Wool Hoodie: VOORMI ‘Core Construction’ Review

‘Core Construction’ embeds technical properties into the fabric without a sticky sandwich of membrane and fibers. And this year, the brand says the technology is reaching new heights.

The first raincoat was made in 1824 when Scottish chemist Charles Macintosh sandwiched soft rubber between two layers of fleece. The same construction is still used for the raincoats, which now also have a lot of glue holding the layers together.

If you’ve ever felt cold, clammy or wet inside your waterproof breathable jacket, this is why.

(Photo/Berne Broudy)

With its new Core construction, Voormi has reinvented the way to make clothing waterproof and breathable, ditching sandwich construction for everything from sweaters to base layers made with fewer layers and no glue. The brand’s first two products are a sweatshirt that beads up water and never sweats, and a grilling apron that blocks heat.

Originally introduced in 2015, Voormi now features their second generation Core Construction technology which has twice the waterproof and windproof properties of the original. We put the Hero Two-Pocket Hoodie through its paces to see for ourselves.

Ditching Sandwich Construction: VOORMI Basic Construction

VOORMI has understood how to integrate a multitude of membranes into the fibers of a fabric.

“Most fabrics contain up to 90% air,” said VOORMI Chief Technology Officer Timm Smith. “It’s a waste of space. We have therefore designed a waterproof and windproof membrane in a single layer of fabric. And we can create Core Construction garments using wool, cotton, nylon, carbon fiber and polyester and integrate Core Construction into each of them.

Core Construction by Voormi - pull upland

The base construction results in a garment that looks more like a sweater or base layer than a jacket. It provides the weather protection you want and expect when you’re outdoors.

And he does it with clothes that are comfortable, breathable, soft and quiet… but still waterproof and windproof.

Because there are no layers and no glue to bond the fabric to the membrane, Core Construction is unlike anything waterproof and breathable we’ve used before.

VOORMI Core Construction Hoodie Review

We’ve tested VOORMI’s 2022 Sportsman Two Pocket Hoodie, both the Core Construction version and the standard version. The fleece and fleece hoodie, which has always been made with the tightest and most resistant water-repellent wool, is now fully waterproof and breathable thanks to Core Construction.

During a downpour while hiking, water beaded on the surface of the sweater and rolled up. When I put my arm under a faucet to see if the pressure would force the water through, the water flowed. The sweater was otherwise indistinguishable to the touch from the non-Core Construction version.

Unlike traditional waterproof layers, there was no crease or crease feeling on the Core Construction Hoodie. Both iterations resembled comfortable sweatshirts, with a fleece lining and a tightly woven wool exterior.

The hoodie was warm and durable – great for hunting, fishing, working in the woods, and logging backcountry ski tours. While wearing the hoodie and riding up a backcountry ski trail, I didn’t sweat as much as if I was wearing a jacket. That’s because Core Construction remains highly breathable.

Meanwhile, the upper and lower kangaroo pockets gave me space to store gloves, tools and other gear. And while I haven’t worn these peaches, VOORMI says the pockets are placed for accessibility even if you’re wearing waders.

Between the two, the Core Construction Enhanced Hoodie was warmer than the non-Core Construction version, as the wind passed through the standard version. But the face and back of both were almost identical.

VOORMI Basic Build Styles

Voormi base build style

So far, VOORMI has released its basic construction in three styles – two sweaters and an apron. The three pieces begin to hint at the possibilities of this creative way of constructing objects made from woven fabrics.

The sweaters are waterproof and breathable. And the apron is made for high heat cooking. It was a collaboration with celebrity chef David Rose and although it is thin and flexible, it blocks the heat


Initially, VOORMI planned to release Core Construction with waterproof and breathable base parts using Core Construction. But these are on hold at the moment.

We’ve had a chance to touch and feel the fabric, but VOORMI doesn’t have any finished pieces to test yet. But we’re intrigued by the future of this technology – the idea of ​​running in a waterproof, breathable shirt and leaving the jacket at home is exciting.


The base construction is remarkable, not only because it turns your fleece into a jacket, your sweater into an outer layer or makes your base layer waterproof without being wrinkled, sweaty or stiff. This has the potential to significantly change our approach to layering.

Soft and flexible waterproof-breathable base layers that look like a shirt, not a jacket, will likely be the next iteration. But the big picture is that Core Construction is a new way to build woven garments and more. It allows VOORMI to insert a wide range of functional materials into the fabric.

For now, it’s weather protection and heat protection. In the future, these could include printed electronic circuits or layers added to carbon fiber to improve its ability to repel heat and more. keep an eye on VOORMI to see more.

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