I did extensive research online for shirts and landed on wuru. They are one of the only ones with 100% merino - not a blend. I bought the medium in black, grey and violet. Love these shirts - can't rave enough about them. The cut is very comfortable, The fabric is not paper/see-through, so thick enough to keep me warm without being too thick/bulky. I've put them in the washer a few times and then air dried them - they kept their shape. And these shirts are amazing and not retaining any smell - even after repeated uses!
And can I give a shout-out to customer service??? Collin in customer service reached out to me that they had run out of black, gave me a couple of options. He was super nice and helpful - we communicated back and forth. I wasn't in a super rush, wanted to wait, and so he rushed an order into production and I was soon in possession of all the shirts. Wow. That's great customer service!