Yak wool makes an optimal travel blanket. Yak down is very light, warm and soft. It is more durable than cashmere. However, it’s rare to find a blanket made with 100% yak wool. Typically, you must look in stores that specialize in luxury fiber goods.
Here is a list of what’s available online:
100% Yak Safari Blanket by Khunu (UK)
100% Yak Wool Blanket by Khunu (UK) — 190cm x 120cm — 780 grams — $426
Khunu is a reliable yak wool brand — their travel blankets are very soft.
60% Yak Wool Blanket by Cashmere Boutique (Amazon)
Yak Wool Blanket by Cashmere Boutique — 178cm by 120cm — 60% and 40% camel wool — $200
This blanket is available on Amazon — it is 60% yak and 40% camel wool. In my tests this blanket was warm and reasonably soft. I don’t love the tassels, but I can overlook them in this case.
Thick 100% Yak Wool Blanket by Mongolia Shop
100% Yak Down Blanket by Mongolia Shop — 200cm x 150cm — weighs 1.8 kg or 3.9 lbs — $277
I haven’t tested this blanket — it seems like it ships from Mongolia.
100% Eco Yak Down Blanket Travel Throw by Handcombed (UK)
100% Yak Wool Throw by Art Himalaya (USA)
100% Yak Wool Throw by Art Himalaya (USA) — 150cm by 130cm — $150
This is an inexpensive but thin yak down blanket.