Laboratory tests have shown that young yak wool is 18-20 microns long. It can be seen that the high-quality yak wool is at the same level as the second-class cashmere (16-19 microns). This type of wool is a valuable raw material that has reached the level of goat cashmere due to its elasticity. Yak down socks tightly fit the leg, they are comfortable, warm but not thick will not hamper movement. The sole uses the technology of strengthening the thickness of the material (double knitting). Socks will last a long time.