...you may want to check your local Costco. My Costco again has these great long sleeve tees 100% Australian merino wool for $16. They do not itch at all, very fine, do not pile, do not stretch and machine washable. I bought the first two 3 years ago and they are still going strong. All my other tees of the same age - cotton, rayon, modal, etc. -are long gone but these last. They come in crew and v-neck styles and many colors: teal, apple-green, purple, lilac, black, beige, magenta, light grey, charcoal grey... I bought magenta and both shades of grey.
I like to layer them under jackets, sheath dresses and cardigans and also wear them alone with scarves. The only drawback to them that they are a bit short to wear with jeans for me but I am very tall, they would be good length on average height I think.
Just wanted to share: I am always excited when they appear at Costco in new colors!
I don't know if US Costco stocks them but Canadians should check them out for sure.