The fabric of the woolen sweater is soft and thick, and the fibers of the fabric are tightly hug each other. This structure also determines that the fabric will have a better warmth retention performance.
In addition, wool also has excellent water absorption properties, which can absorb water equivalent to 1/3 of its own weight. This ratio of water content is very consistent with the physiological needs of the skin, so woolen sweaters generally feel very comfortable after being worn. As for its thermal performance, let alone mention it. Wool has a higher thermal performance among natural fibers. For example, sweaters, down jackets and even suits can use wool fabrics. Finally, I have to mention that the overall drape of wool fabrics is better, the luster is soft and generally not pleated, and pure wool will have better breathability