This yarn is carefully selected from ultrafine RWS Wool and Yak, the latter originating from the high‑altitude Qinghai‑Tibet Plateau and offering excellent warmth retention. It is supplemented with water‑soluble PVA fiber (PVA). The wool gives the fabric soft elasticity, natural luster, and a smooth, skin‑friendly hand feel with almost no prickliness. The Yak, with its hollow structure, builds an outstanding thermal insulation layer, while also providing superior moisture absorption, breathability, and natural warmth – it quickly wicks away sweat and maintains a constant body temperature.