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The "Three Necks" Rule for Winter Warmth, and 5 Montbell Pieces That Do It | Neck, Wrists, Ankles

2025.12.07

You're wearing perfectly good clothes and you're still cold. Most winters, that happens at least once. It may not be the clothes at all — it may be that you've left the lids off.

The key is what's known in Japan as the "three necks": your neck, your wrists and your ankles. Covering those three properly warms you far more efficiently than piling on another thick layer. Below is the reasoning, along with honest reviews — prices included — of five warm Montbell pieces I use for everything from winter hiking to the daily commute.

What the "three necks" actually means

The body has three places where heat escapes easily, and where warming a small area warms all of you: the neck, the wrists and the ankles.

At all three, large blood vessels run just under the skin. Think of it as the pipes carrying warm blood around your body being left exposed. Chill those spots and cooled blood circulates everywhere, taking the cold right to your core. The reverse is also true: protect the three necks and you warm up efficiently. Below, in the order neck, ankles, wrists, are the pieces I use to do it.

1. Super Merino Wool Balaclava (the first neck)

What it is: merino that generates heat, sealing the neck

The carotid arteries run through the neck, feeding the brain and torso, so leaving it in a cold wind is like opening a window wide in midwinter. Rather than a scarf, which always leaves gaps, the right answer is to seal it with a balaclava. It's roughly 80% Super Merino Wool, Montbell's own merino. Alongside the warmth of the trapped air, it uses the heat merino releases when it absorbs moisture from sweat and breath. At around 50 g it's thin enough not to bunch under a helmet. There's a moulded nose core in the fabric over the nose, which — shaped to your face — stops much of your breath escaping upward and does a lot to keep goggles and glasses clear.

In use: several configurations in one piece, and machine washable

It sits where your breath collects, which would normally mean damp, cold fabric, but Super Merino Wool turns that moisture into heat, so it resists the chill of cooling sweat. You can wear it fully closed with only your eyes showing, pull the mouth down, fold it back as a face guard, or push it all the way down to a neck gaiter — all without taking it off. It resists odour well, which matters on a trip where you can't carry a spare. And provided you keep to under 30°C, a gentle cycle and a neutral detergent, it goes in the washing machine.

Price: ¥3,960 (incl. tax, at time of filming)

2. Merino Wool Alpine Socks (the second neck)

What it is: serious thickness, insulating the feet

The ankle is another place where large vessels pass close to the surface. Your feet are also the furthest point from your heart, so blood reaches them least easily and they're slow to recover once cold. Which is why half-hearted socks don't do — you want real thickness to insulate with. These have thick cushioning that softens impact under the foot and holds off cold toes for considerably longer.

In use: a slightly luxurious warm sock for the whole winter

I'd describe these less as a dedicated deep-winter alpine sock and more as an indulgent pair you can use all winter — low-mountain hikes, walking snowy hills near town, boots in snow country, winter camping and sleeping in the car. Merino resists odour, so you can wear them hard in rotation. One caution: given the thickness, don't try to force them into your usual snug city sneakers. Pair them with winter boots or hiking shoes that have a little room, or keep them for sleeping.

Price: ¥2,860 (incl. tax, at time of filming)

3. Chameece Gloves (the third neck)

What they are: thin, warm, and easy to work in

These are the piece I use most. The inside of the wrist has vessels running under thin skin, and the reason your hands stop working in the cold is those vessels contracting. These gloves put a layer of air over them. "Chameece" is Montbell's lightweight fleece, a high-density knit of very fine polyester that holds air. Thin, but genuinely warm, and it doesn't get clammy when your hands sweat — it dries quickly.

In use: works on the mountain and in town

Their real strength is dexterity. Because the fleece is thin, you can still operate a phone, camera buttons or a pack buckle. They're excellent as a liner glove for hiking, of course, but they're also perfect for cycling to work, warming up the car, or walking the dog — anywhere it's cold but a bulky glove would be too much. The colours are subdued enough for everyday clothes. One thing to note: they aren't windproof. On a windy day, layer a shell glove over the top.

Price: ¥2,200 (incl. tax, at time of filming)

4. Cable Knit Work Cap (the roof)

What it is: the lid that keeps warm air in

Warm the three necks and the warm air still rises and escapes. This cap is the roof that stops the air you've warmed at the neck leaving through your head. The short brim — about 5 cm, in the manner of a work cap — keeps your field of view open and doesn't get in the way. The body is a three-dimensional cable knit in acrylic blended with wool: the loft and durability of acrylic, plus the comfort and character of wool. The cable structure holds a good volume of air between the fibres and blocks wind properly.

In use: how you wear it decides where it belongs

On a genuinely cold day, or on a windy ridge, pull it on from the back and bring it forward so it covers your ears — that's the warmest configuration. In town, sitting it lightly and high looks better balanced. The short brim means it doesn't obstruct your view when you look up at a summit or raise a camera. As for care, being an acrylic blend it's safest hand-washed by pressing in lukewarm water with a neutral detergent and dried flat. It's sensitive to heat, so avoid a hot iron or heavy steam.

Price: ¥3,520 (incl. tax, at time of filming)

5. Super Merino Wool L.W. U-Neck T-Shirt (the heat source)

What it is: air conditioning you wear

The three necks are about not losing heat. But if there's no heat moving through the pipes in the first place, nothing warms up. This base layer is what produces it. An 85% wool / 15% polyester blend, it generates heat as it takes up the light sweat and moisture your body gives off in the cold. Rather than warming you from outside with electricity, it uses your own moisture to warm you gradually — like air conditioning you wear. "L.W." stands for lightweight, and lightness is the point.

In use: light, and it resists the chill of cooling sweat

Three things stand out: it's very light, it's properly warm once you start moving, and it neither traps humidity nor develops a smell. Synthetic base layers can leave you suddenly cold after you've sweated; merino holds the moisture in the fibre and releases it slowly, which takes most of the shiver out of that moment. The cuffs and hem use a spiral stretch construction with very little constriction, and the seams are flat, so nothing bunches. The fibre is fine enough that the usual wool prickle isn't an issue. Being lightweight, one layer alone can feel thin if you're standing still in deep winter — but for hiking and travel, where you're moving, it's a piece you can rely on.

Price: ¥5,940 (incl. tax, at time of filming)

What I've settled on: get through winter by thinking about the three necks

These five aren't just recommended products — they're cold-weather parts chosen to match how the body is built. The logic is simple: protect the large vessels at the neck, stop the extremities cooling at the wrists and ankles, generate heat with a base layer, and put a lid on with a cap. Once that logic is clear, you spend far less time wondering why you're so cold — on the mountain, but also on the morning commute, on a walk, or shopping on a windy day.

Before you add another expensive down jacket, start with the three necks. I hope your winter is a warm and well-judged one.

※All prices are inclusive of tax, as at the time of filming. Stock and prices change, so please check the official site for current information.

🛒 See the gear from the video as a list → Montbell staples: light and dependable

※As an Amazon Associate, Yoshimi Iwasaki earns from qualifying purchases.

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This post contains affiliate links. Prices and specifications are as of the video's publication date. Most items are sold in Japan.

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