I can only speak to the itchiness of merino and Icebreaker generally. I also get super itchy from wool such as that found in sweaters and older socks. But merino wool is a much smaller fiber and is much finer than the traditional wool you find in older pieces. It feels more like a very soft cotton than wool and I actually have no itching issues with my Icebreaker layers in the Superfine200 weight.

This dress is really soft, for me. I do not mind the texture of merino wool, generally, but am aware of it; and this dress is softest. It's also see-through; needs a slip, though I am thinking of buying it in a second color and sewing the two together, to make a lined/reversible merino wool summer tank dress. Self belt or elegant belt work well. The blue is just what my monitor shows. Well made, too!

You can also wash your new Icebreaker- that makes it softer.

I had the same issue until I discovered Merino wool. Icebreaker uses very fine wool, which makes it very soft. The softest I have worn.