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The surface of woven fabrics is often roughened with a raising card to create a softer feel, higher volume and greater thermal insulation [11] Vicuña wool is considered the rarest and most expensive legal wool in the world; in 2010, raw wool traded for about 7-15 dollars per ounce. [12] The sorted and spun yarn trades at about $300 per ounce.
Wool's crimp refers to the strong natural wave present in each wool fiber as it is presented on the animal. Wool's crimp, and to a lesser degree scales, make it easier to spin the fleece by helping the individual fibers attach, so they stay together. Because of the crimp, wool fabrics have greater bulk than other textiles, and they hold air ...
Vicuñas produce small amounts of extremely fine wool, which is very expensive because the animal can only be shorn every three years and has to be caught from the wild. When knitted together, the product of the vicuña's wool is very soft and warm.
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In the United States, under the U.S. Wool Products Labeling Act of 1939, as amended, (15 U. S. Code Section 68b(a)(6)), a wool or textile product may be labelled as containing cashmere only if the following criteria are met: such wool product is the fine (dehaired) undercoat fibers produced by a cashmere goat (Capra hircus laniger);
Shahtoosh is the finest animal wool, followed by vicuña wool. As undomesticated wild animals, the chirus cannot be shorn , so they are killed for this purpose. Due to the severe decline of the chiru population by 90% in the second half of the 20th century, they were internationally classified as a critically endangered species until 2016. [ 1 ]
Cashmere wool is wool obtained from the Cashmere goat. Cashmere is characterized by its luxuriously soft fibers, with high napability and loft. In order for a natural goat fiber to be considered Cashmere, it must be under 18.5 micrometers in diameter and be at least 3.175 centimeters long.
In the U.S., utility gas prices in September were 70% higher than in recent years. Europeans, who already pay much higher for natural gas, saw bills rise sharply by 50% — for example, in Estonia.