60% Merino wool, 40% TencelThis is our finest wool underwear in a unique Swedish-made fabric that we spinning and knitting in Boras. The fabric composed of 60% Merino wool finest from Australia and 40% Tencel manufactured in & ouml; Austria. The fabric is the ultimate combination of warmth and coolness, strength and elasticity, naturalness and technology. Clothing made of natural fiber Tencel is more absorbent than cotton, softer than silk and cooler than linen. Merino wool is wool's all fine qualities - warm even when wet, naturally antibacterial and self-cleaning ability. Merino wool is also very short fibers that make the itch but is wonderfully soft against the skin. The wool we use is of course certified without mulesing. The fabric is washed before cutting portions occurs which gives a 100% shrink and twist the garment. The result is a stretchy, super soft underwear shirt that warms just enough for medium-intensive activities. If you are frozen so you can supplement with an extra layer thermal garments. The garments are designed and built with elite athletes, it means they work great no matter what level you are at.