TIBET/GANSU 100% YAK DOWN DARK BROWN ROVING TOPS * Contents: 100% Yak * Micron: 18.5 μm * Length: 1.5-2.0 inch * Crafting: Blending, Spinning, Wet Felting, Needle Felting * Care: Hand Wash Only Yak down fibers are a unique type of natural fiber that come from the undercoat of the yak, a large mammal found in the Himalayan region of Asia. These fibers are known for their softness, warmth, and durability, making them a popular choice for high-quality clothing and other textiles. Yak down fibers are finer and softer than traditional wool fibers, which makes them more comfortable to wear against the skin. They are also naturally insulating, which means they can keep you warm even in very cold temperatures.