High performance thermal undergarments from Sweden. Woolpower® is a collection of garments for the entire body that can be combined in different ways depending on temperature and activity. Woolpower® garments are made from Ullfrotte Original material. Everything is made in the factory in Östersund. Material comes in various weights, each of which has a different function and advantage. Woolpower® garments are available in 200, 400, 600 och 800 g/m².

The material - Ullfrotté Original

Ullfrotté Original is the material developed by Woolpower AB in Östersund in the early 1970’s in collaboration with the Swedish military, scientists, doctors and survival experts. The textile is highly wear resistant and consists of fine Merino wool, polyamide/polyester and air. Ullfrotté Original is 80% air.

The material is knit so that one side is smooth, and the other has terry loops. The lofty terry loops, in combination with the crimp in the wool fibers, creates a knitwear capable of trapping a lot of air. Up to 80% of the material actually consists of air, which means that the material has an excellent capacity to trap body heat. The more air you can keep still around the body, the more heat you can retain.

Air does not to any large extent transport heat away from the body, but textiles do. Ullfrotté Original’s lofty knit has few contact points with the body, which reduces the number of points where body heat can be wicked away.

The permeable Ullfrotté Original material easily lets moisture escape from the body. As you become hot and you perspire, vapor pressure builds up inside your clothes. The moisture molecules strive to get outside where the air is colder and the pressure lower. If the material is loose and the fibers have the right properties, they will help transport moisture away from the body.

The soft terry knit surface of Ullfrotté Original can easily be worn on warm skin to maximize body heat retention, while simultaneously helping to wick perspiration away from the skin. Ullfrotté Original retains body heat, even when wet.


Merino wool is known as a very fine, soft and crimpy wool and is perfect for garments worn next to the skin. The wool used in Ullfrotté Original is 22 microns, meaning that the thickness of the wool fibers is 22 thousandths of a millimeter. This results in comfortable wool that is also strong.

The material is hardwearing

Wool is a material with excellent properties but its wear resistance is not optimal. In order to add maximum wear resistance to the material, the wool has been mixed with one third synthetic fibers. The majority of the Merino wool is closest to the body while the polyester is placed on the outside for the greatest wear resistance.

Hardly any seams

Ullfrotté Original is knitted on specially designed machines where everything from the size of the terry loops to the density of the stitch is carefully tested. Each garment part is knitted on circular knitting machines and comes out in tubular shape, completely free of seams that can both abrade and break.


100 % made in Sweden. Woolpower® products, from yarn to finished gament, are made by Woolpower AB in Östersund, and the entire production facility has been located in Östersund since its founding in 1972.

The material used in Woolpower® is 2/3 fine Merino wool and 1/3 synthetic material.

Our Merino wool comes from Patagonia sheep whose wool fibers are much finer than those of other sheep, thus producing a softer and more comfortable wool.

It’s function. Not fashion.

The goal of Woolpower is to make high quality, highly functional products that last a long time. The production in Östersund is quality controlled and certified in accordance with ISO 9001:2000.

Some of the reasons to why Woolpower products offer such a high standard of quality and longevity are:

Few seams that rub and tear

Woolpower look at seams as something negative since they are the weakest point in the material and present the highest risk of tearing. In addition, seams in general are less elastic and not as soft as the rest of the garment, so with fewer seams the garment is more comfortable. This is why most of our garments are constructed of finished “tubes” and thus have fewer seams. Even the cuffs for both arms and legs are made in one piece.

Manufacturing is a craft

The most important thing in Woolpower is not to make as many garments as possible, but to make garments of the highest quality. Therefore, there are various controls and tests throughout their production process to make sure that no errors will occur. Each garment is made by one seamstress who also does the final quality control on the finished item. The seamstress checks the garment and approves it by sewing in her name label.

Of course, errors can occur. If the error is a cosmetic blemish that does not affect the item’s function, the garment is sold as a factory second in our outlet store. If the error is grave enough that they still cannot sell it, they give the garment away to charity.

Not 100% wool

Wool is a unique raw material with many positive characters. But wool is not as wear-resistant as synthetic fibers. Because of this, the woll is blended with polyester, among other fibers, which allows us to keep the wool’s character while simultaneously making the garments stronger than if we were to make the garments from 100% wool.

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