As the weather cools, I've been looking for wool tights, and have found that it's hard to find ones that are more than 40% wool.
While I understand the need for some nylon and spandex to keep them from bagging and ending up in a puddle around my ankles, most I've seen have a lot of acrylic "filler".
A hot tip I saw in a comment on a LGRAB post, that I'll pass along: Smartwool tights are on sale at Orvis (yes the fishing place). They're 70% wool, nylon and spandex, without any acrylic.
I was cold in the office this afternoon, so I put them on under my pants, and they're nice and cozy and so far itch free! I bought a dark chocolate colored pair at the store, then bought a black pair online. They seem true to size (I got a medium) and have a nice stretchy weave. Given Smartwool's record, I am optimistic about their durabilty.
Edited- I'm nice and toasty warm after wearing them in the office for 2 hours- even got to unzip the down vest I was wearing (yes it's cold in our office) no itchies yet!