Technical details
Open Accordion
Size + fit
Open Accordion

Fit guide: The Ice Age Sweater has a regular fit.

Model wears: Runner Tyler Maher is 6ft 4 / 193cm with a 38 inch / 97cm chest. Tyler has an athletic build and is wearing the Ice Age Sweater in size XL.

Personalised advice: See our size guide for more advice on sizing, or you can ask us for personalised sizing advice here.

Returns and exchanges: Don’t worry if you order something and it doesn’t fit – we have a free, no hassle 30 day return and exchange period.

Fits chest83-9091-9899-106107-114115-122123-130
Fits waist71-7676-8181-8686-9191-9696-101
Fits chest33-3636-3939-4242-4545-4848-51
Fits waist28-3030-3232-3434-3636-3838-40
Size Table Swipe

Swipe to see more

Also available

Ice Age Sweater

The fleece works like a second skin

The Ice Age Sweater is designed to recreate the feeling and performance of the soft hides worn by prehistoric man. These early designs would have worked just like a second skin, regulating your temperature in the heat and cold, while protecting you from the wind and rain. With the needs and materials of the Upper Paleolithic in mind, we turned to wool. It’s already soft, elastic, and superb at keeping your temperature stable, and it can absorb a third of its weight in water and still feel dry.

Ice Age Sweater

Early clothes were made from hides and plants

If you want to know what early man wore, Ötzi the Iceman is the best example we have. Discovered in 1991 in the Ötzal Alps between Austria and Italy, he’d died more than 5,000 years earlier before being frozen and preserved in a glacier with an arrowhead wedged in his left shoulder, and wild goat still in his stomach. He was kitted out with a bearskin cap and waterproof shoes made from deer hide, bearskin and tree bark. His cloak was made of woven grass. And his rugged coat was made from sheep and goat hide, asymmetrically stitched together with sinew and plant fibres.

Ice Age Sweater

Built with sheep’s wool and lab wool

Just as early man stitched furs and hides from different animals together using bone needles, vine and sinew, the Ice Age Sweater combines two different high-performance materials – recycled sheep wool and synthetic lab wool. And it’s constructed with the same asymmetric stitching and patterns they would have used. To create the thick sheep wool sections we’ve used recycled wool, and rather than spinning it in the traditional way, we’ve constructed it in thick, rugged clumps that mimic a sheep’s natural coat.

Ice Age Sweater

We use recycled sheep wool for insulation

Sheep have to survive scorching summers and freezing winters, so their fleece has evolved to help them stay cool in temperatures of over 30°C, while staying warm in -10°C. So when you wear wool fibres they respond and adapt to the conditions you find yourself in – either trapping or releasing heat depending on the temperature and humidity of your skin. So unlike a down jacket, the Ice Age Sweater is thermoregulating, and can cope with rapidly changing conditions.

Ice Age Sweater

Wool traps millions of warm air pockets

Staying warm is all about trapping as many pockets of air next to your body as possible and that’s what wool is built for. Every fibre is hollow which means you have millions of air pockets inside the fleece. And as the natural curl of wool fibres traps more air than straight fibres, the microscopic texture of the fabric itself retains heat. The way they knit together also means that the wool stays evenly distributed around the fleece, rather than collecting in specific areas and leaving cold spots.

Ice Age Sweater

Wool helps regulate your temperature

The warmth-to-weight ratio of wool is even better than down. It’s also hygroscopic, which means it absorbs and gets rid of moisture faster than other materials. The tiny curls in each fibre allow the air pockets to stay intact, so it will keep insulating even when it takes on water. It can soak up a third of its own weight in water before feeling damp.

Ice Age Sweater

It’s combined with advanced synthetic wool

The other half of the Ice Age Sweater was created in a lab, so it starts life at the opposite end of the evolutionary spectrum. It’s an advanced synthetic wool made by Polartec with an extremely high warmth-to-weight ratio, that’s lightweight and ultra-soft. Made from 69% recycled material and bluesign approved, its fibres are engineered to trap your body’s heat in thermal air pockets as well as repel moisture, so even if you get wet you’ll dry out fast.

Ice Age Sweater

A high-stretch, windproof lining

While wool is amazing at trapping warmth close to your body, it’s not good at keeping out the wind. So we’ve lined the entire inside of the sweater with a highly elastic, windproof backing. It adds strength and durability to the fleece, and means that none of the reinforced stitching will ever be in contact with your skin.

Ice Age Sweater

Cuffs that work like gloves

Your hands need as much shelter from the cold as the rest of your body, so the cuffs of the Ice Age Sweater are engineered to keep blood flowing when the temperature drops. They are designed to work like cut-off gloves when you need them to, by running all the way up to your knuckles. While most of the cuff is constructed from a double layer of woolly fleece, two slim panels of high-stretch material overlap to create a thumbhole to secure the sleeves in place.

Ice Age Sweater

It comes with a high, fleece-lined collar

A high, fleece-lined collar keeps your neck sheltered in harsh weather. It closes with a quarter-zip, protected by a hard-wearing Cordura storm flap that fastens down with two metal snap buttons. We designed the sweater without a hood so that it’s fast and easy to layer over a waterproof shell when the rain comes on.

Ice Age Sweater

Two zipped side pockets

Two deep zipped side pockets let you tuck your hands in for warmth if you’re being battered by a snowstorm. The pockets are protected by a tough Cordura storm flap on the outside, and inside they’re fleece-lined and elastic. They’re even large enough to hold a couple of small axes, firewood and rocks, or satellite phone, maps and supplies if you prefer.

Ice Age Sweater

All critical seams are reinforced

All of the Ice Age Sweater’s critical seams are reinforced with a double layer of flatlock stitching for increased durability and longevity. It recreates the advanced bone-needle stitching that would have been needed to sew thick animal hides together.

Ice Age Sweater

You can tighten the waist fast in a blizzard

When the wind picks up or a blizzard hits, you can tighten the sweater up at the waist to create a seal around your body. You’ll find an elasticated cord at the hem which you just pull out to make the sweater as tight as you want it, then you fix the cord down into two small grooves to anchor it. All the engineering is as minimalist as possible, so there are no toggles on the outside.

Works well with