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Vårt isolerande material
Ullfrotté Original
Ullfrotté Original är ett material utvecklat av Woolpower i Östersund i början av 1970-talet. Det är ett stickat tyg där utsidan är slätstickad och insidan består av frottéöglor. Kombinationen av merinoull, syntetfiber och en luftig konstruktion gör att materialet både isolerar värme och transporterar bort fukt från kroppen.
What is Ullfrotté Original?
Ullfrotté Original is a knitted fabric with terry loops on the inside. This construction creates a lofty material that traps a large amount of air, providing effective insulation. The material consists of fine merino wool blended with synthetic fibers for increased durability.
Why Ullfrotté insulates so well
Ullfrotté traps a significant amount of air within the fabric. The soft terry loops, combined with the natural crimp of the wool fibers, create an insulating layer with few contact points against the skin. Since air conducts heat less effectively than textiles, this helps retain body heat close to the body.
Wicks moisture away from the body
When the body becomes sweaty, moisture is transported away from the skin through the material. At the same time, the air trapped in the fabric continues to provide insulation. This is why the garment can still feel warm even when the material is damp.
Soft yet durable material
Merino wool is a very fine, soft, and naturally crimped wool that is ideal for garments worn closest to the skin. The wool used in Ullfrotté Original is 22 microns, meaning the fibers are 22 thousandths of a millimeter thick. This results in a comfortable wool that is also strong.
However, because merino wool is crimped, its durability on its own is not optimal. To make the garments we knit as durable as possible, the wool is blended with one-third synthetic fibers. The side closest to the body consists mostly of merino wool.
How Ullfrotté is used in our garments
We knit Ullfrotté Original in several thicknesses, used in different types of products.
Ullfrotté 200
Ullfrotté Original 200 grams is our thinnest variant of Ullfrotté. It is used in our base layers, Socks 200, and in accessories such as Wrist Gaiter, Headband, and Belly Warmer.
Base layers in Ullfrotté 200 can be worn closest to the skin, but also used as a mid layer in combination with our thinner material, LITE.
Ullfrotté 400 and Ullfrotté 600
Ullfrotté 400 and Ullfrotté 600 are two thicker materials that we use in our mid layers. Both provide extra insulation and warmth.
Our Full Zip Jackets are available in both thicknesses, where Ullfrotté 600 offers a more robust feel, with a higher weight and a denser structure, while Ullfrotté 400 is lighter and traps more air.
In addition to mid layers, there are also warm socks made in both Ullfrotté 400 and 600.
Ullfrotté 800
Our absolute thickest material, used exclusively in our classic Socks 800. Perfect for cold winter days, cozy evenings by the fire, and for sleeping in when camping. Warm, soft, and durable socks that will keep you warm for many years.
Frequently Asked Questions about Ullfrotté Original
After some use, your garment from Woolpower may start to pill. This is completely natural and is due to how the fabric is constructed. The pilling does not affect the function of the garment.
To provide the best possible insulation, we preserve the natural crimp of the wool. The yarn is not spun too tightly, and the fabric is knitted relatively loosely with terry loops on the inside. This construction traps a large amount of air, helping to retain body heat.
The result is a warm, elastic, and comfortable material. The fact that the fabric may pill over time is therefore a natural consequence of how it is made.
Ullfrotté feels warm even when it’s damp thanks to both its construction and the unique properties of wool. The fabric traps a large amount of air, which continues to provide insulation even when moisture is present.
Wool can also absorb moisture without feeling wet against the skin. When the wool fibers absorb moisture, so-called heat of absorption is released. This means that a small amount of heat is generated within the material as the moisture binds to the fibers.
At the same time, moisture is transported away from the skin, while the insulating air layer remains and helps retain body heat.
The result is that the garment can still feel warm and comfortable even in damp conditions.
The material combines insulation and moisture transport. The terry loops create a lofty fabric that traps body heat, while the wool fibers help move moisture away from the skin. This contributes to a stable and comfortable temperature close to the body.
The numbers indicate the fabric weight in grams per square meter. The higher the number, the thicker the material.
Thinner materials, such as 200, are often worn closest to the skin or during higher activity levels. Thicker materials, such as 400, 600, or 800, are used as insulating layers or in colder conditions with lower activity levels.