More about yak wool:
Yak wool is the new cashmere =)
As soon as you put your hand on the fiber, it will give you soft, silky, luxury and delicate feeling. You may even think it's cashmere as the texture is incredibly light and has the same softness.
Anything made from this premium down will keep you as warm and dry as their fibers do so for yaks in Mongolia. Breathable, quick drying, comfortable even for long outings. Yak down is also anti-microbial and you will not notice any smells even after intensive wear. Yak down fibers are hollow, allowing them to trap air and provide high warmth-to-weight ratios.
Yak down even outperformed Merino in independent laboratory testing boasting 40% more warmth, 66% greater air permeability, and 17% greater water vapor permeability than Merino wool fabrics.
Please keep in mind that different computer/mobile/tablet monitors will display a color differently for a variety of reasons. Especially when it's a natural color.
Wool repels dirt, so it naturally stays on the outside of the fabric and can usually be wiped away.
If you really must wash, use cold water and a mild shampoo. Lay flat to dry. Avoid heat as it may remove lanolin from the fibers and can damage the structure, resulting in broken fibers and decreased durability.