I wore wool socks for 3 days and my Shak one night, as well as a short sleeved wool top for hiking and mountain biking last week. I noticed after wearing the top one day, I felt itchy the next day when I tried wearing another one. I hope this doesn't start again, as I was having some pretty annoying allergy stuff going on with wool at the end of the winter. I decided to wear a regular wicking top, so I didn't end up ruining my vacation. I also wonder if the 2 heavy wool blankets I was sleeping with increased my sensitivity.
I have invested in so much wool for the winter, that I will be devastated if I can't wear it. Although, my Shaks don't bother me, as long as there's a long sleeved shirt under them.