Cost about 30€ instead of previously used 3€ cotton T-shirts.
Can wear one for about 3 weeks without washing, with no body odor. Much more pleasant to the skin, even for doing sports, driving, etc. Also, warm in winter, airy in summer. Plan to switch most clothing to merino wool.
For moisture management/warmth in colder weather, we're also checking out mesh baselayers [1] since merino does not dry quickly under multiple layers.
[0]: https://nuyarn.co.nz/ [1]: https://www.brynjeusa.com/product-category/super-thermo/
They weave nylon filaments along with wool for durability
Don't know where you live, but I visited the shop and looks like they only ship to Romanian addresses.
I rotate through 3 merino T-shirts alternating one every day. If they start to smell, you can just hang them out for the night and they'll be fresh as daisies again.
I think I wash them like once a month or two in a wash that has lanolin in it, which replenishes the natural fats in the fiber and makes it last longer.
I was also quite skeptical when I heard, and occasionally ask others to make sure I'm not fooling myself w.r. smell. Also, if I did heavy sports in them, I may stop, even if it was just a week or two. Casual daily wearing could easily go for a month.
the 3 or 4 I have are pretty covered in holes now (no, not moths), I just keep them around for base layers during the winter.
Never had too much special care around them tho.