Merino wool hat. Uncranted, breathable and nice and warm. Knitted in the Czech Republic. 93% Merino-Wolle, 7% Elasthan (keeps the hat still stable on the head even after wearing a lot) Hand washing Merino fibers are extremely fine. Human hair is about 70 micrometers (m) thick, while that of a merinoshaf is only 14.5 to 24.5m thick. One micrometer is a millionth meter: the finer the micrometer, the softer the fiber. The Merinogarn used in the Bauhaus series is one of the finest ever: 19.5m. This means that the yarn is exceptionally soft, incredibly light and not irritating. A thread thickness of 19.5m is often used for baby clothes or thermal underwear - clothing that is worn directly on the skin. A perfect choice for a Wolvis piece!