Not OP, but I have socks, underwear, and a shirt. The shirt I feel a bit meh about, because the durability hasn't been great and it was expensive (but very comfortable). Socks and underwear have been great for skiing, cycling and just days when I walk a lot. I can wear my Darn Tough socks to Disneyland in the summer and they have no smell after a day, whereas cotton socks would be very unpleasant. The ski socks are nice since as long as they're dry they're usually good to go the next day. I have gotten my merino stuff to smell eventually, but it's taken multiple days of heavy usage. And in the meantime, it's a much more comfortable to wear material.

Not OP, but I run, hike, bicycle, ski, backcountry ski, practice yoga, indoor rock climbing, and more in merino wool t-shirts, underwear, and socks.

I find Ibex makes the highest quality tees (their tencel/merino/nylon shirts are incredible for hot summers) and underwear. Icebreaker also makes a variety of good stuff.

I generally look for some amount of nylon for durability, but I have a few 100% merino shirts from icebreaker that I've worn intensively for years with no problems.

I did have some pilling issues with the merino/tencel blend from ibex which is a shame. Gorgeous fabric at first; still feels luxurious.

Laundry is a bigger deal since it's wash cold and dry flat with many of these; that can be a cost, equipment, and/or lifestyle adjustment.

I'm often able to wear the same clothes many days in a row without issue.

For pants, I prefer nylon+elastane blends, but it's hard to find. Prana used to make good things here but their Brion II line was a significant drop in quality.

Not the op, I have some winter running base layers made of meriono wool and and I swear by merino wool glove liners to wear when running outside on the cold. I don't think anything wool would be suitable for exercise when it's warm, but I've never tried it.