How FIBREHEAT® technology works

Warmth that starts with you. Generated, stored and returned.

Fabrics made with FIBREHEAT® heat-generating technology intertwine several different fibers into one highly technical knit. It starts working the moment you put it on — no batteries, no switch.

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01 The fibers generate heat As soon as you put it on, the fabric turns your body’s natural moisture into warmth.
02 They store it That warmth is held in microscopic heat-packs inside the fibers.
03 And return it to you Stored heat is released back to your skin as far infrared warmth.

Warm as you put them on

Warmth begins the moment they're on. No switch, no waiting.

Nothing to charge

No batteries, cables or plugs. Nothing to remember.

Thin enough to layer

Liners and socks slip easily under gloves, boots and sleeves.

Wear them all day

From the first commute to the last dog walk, the fabric keeps working.

Woman wearing FibreHeat Twist Ultra liners

FibreHeat yarn, twisted into the knit

In the fabric

Four things happen the moment you put it on.

What FIBREHEAT® technology is doing inside the knit, in plain terms. No wires, no charging, no power pack.

01

Fibers, intertwined.

Several different fibers are twisted together into one highly technical, functional textile.

02

Moisture becomes heat.

The fabric begins generating heat as soon as you wear it, converting naturally-occurring body moisture into warmth.

03

Heat is stored and returned.

Warmth is held in microscopic heat-packs and converted into far infrared waves (like the sun, below the visible spectrum) that produce real warmth.

04

You stay warm and dry.

Wicking properties move moisture away from your skin, so you stay warm and dry, never clammy.

03 —How FibreHeat works Field Guide · The Layers

The warm layer. Closest to your skin.

Cold air

03 — Your outer glove Or simply the weather. Wind, wet and cold stay on the outside.

02 — FibreHeat liner Fibers knitted into the liner turn moisture into heat, store it and return it.

Moisture Heat returned

01 — Skin Your body gives off heat and moisture all day. In the cold, the heat escapes.

Your body is always giving off heat and moisture. In the cold, most of that warmth simply drifts away. FibreHeat liners are knitted with fibers that turn your moisture into heat, store it in microscopic heat-packs and return it to your skin.

Because the warmth comes from the fabric itself, there are no batteries, wires or settings. It works as soon as you pull them on, and wicking keeps you warm and dry for as long as you wear them.

Wear it alone or under any glove

On a crisp morning, the liner is enough. When it turns bitter, slide it under your ski, work or leather gloves.

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The simple comparison

FibreHeat vs. battery‑heated gloves.

Both keep your hands warm. One asks a lot less of you.

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A general comparison with typical battery-heated gloves. Individual products vary.

FibreHeat / Battery-heated
	FibreHeat	Battery-heated
Weight	Feels like an everyday knit glove	Extra weight from packs and wiring
Charging	Never. There's nothing to plug in	Needs charging before you head out
Bulk	Slim enough to layer or wear alone	Bulkier cuffs to house the battery
Washing	Nothing to remove before cleaning	Battery out first, often hand-wash only
Wear time	Warm for as long as you wear them	Warmth ends when the battery runs down

The honest answers How it works, without the jargon

Eight honest answers. To the questions everyone asks.

Anything that promises warmth deserves a little suspicion. So before you buy, here is how FibreHeat works and where its limits are, answered as plainly as we can.

1.How can a glove heat up without a battery?

The warmth comes from the yarn itself. FibreHeat fibers are knitted into the fabric: they turn your body’s natural moisture into heat, store it and return it to your skin. There is nothing to switch on, because there is nothing electrical in it.

2.Will I actually feel it?

You should notice a gentle warmth building soon after you put them on. It isn’t the hot-plate feeling of a heated glove. It is steadier and quieter, more like a warm hand around yours.

3.How long does it last?

As long as you’re wearing it. There is no charge to run down, so the warmth doesn’t fade halfway through the commute or the dog walk. Take them off, put them back on, and they pick up where they left off.

4.How do I wash it?

Check the care label, because it depends on the piece. Our glove liners, socks, base layer shirt and throw are machine washable: cold, delicate cycle, no bleach, tumble dry low. Our gloves, mittens, hats and neck warmers are dry clean only. Either way there are no wires or batteries to take out first.

Fig. 1 — The fiber, up close

This is where the warmth lives.

FibreHeat yarn, twisted into the knit. The heat-generating fiber is spun into every strand rather than added on top, so the warmth is part of the fabric itself. No wires, no pads, no power pack. Just yarn doing a little more than yarn usually does.

5.Is it bulky?

No. Because the warmth comes from the fiber rather than extra padding, the knit stays thin and soft. Your fingers keep enough freedom for keys, zips and dog leads.

6.Can I wear liners under my own gloves?

That is exactly what they are for. The liners are thin enough to slip under ski gloves, work gloves or a favorite leather pair, adding warmth without changing how they fit.

7.Does it help with Raynaud’s?

FibreHeat isn’t a medical treatment, and we won’t pretend it is. What it offers is gentle, steady warmth you can wear all day, which is what many people with cold hands look for. If you have Raynaud’s, talk it through with your doctor too.

8.What if it doesn’t work for me?

Then tell us. Warmth is personal, and we would rather hear the truth than leave you with a pair you don’t love. Our team will help you find a better fit or talk through your options.

Still have a question? Our team answers every one, in plain words.

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Ready when you are