https://www.massdrop.com/buy/peak-to-plateau-yak-wool-baselayers?mode=guest_open
Peak to Plateau is a New Zealand company making baselayers with yak wool. These are a 190gsm fabric that is a 65% Yak – 35% Tencel (eucalyptus tree fiber) blend. The benefits of yak wool are mainly that it is warmer, softer and more breathable than merino, and the Tencel is also breathable, strong and anti-bacterial.
Full Discloser: I am the founder of Peak to Plateau, so if you have any questions, suggestions or anything else let me know. We are a very new company (1/2 year old) and so anyone that is interested in giving their opinion will be much appreciated. Thanks, Stefan.

