I haven't, but if I had some, I would. It used to be that I could never wear wool because it itched me so badly. As a college student (that was the sweater-girl era, before many of you were born), I bought cashmere sweaters whenever they were on sale. The problem was that I switched directly from a college-student budget to a young parent budget, so all my cashmere from that era has long since been worn to shreds. I wonder if some could be found in thrift stores?
While there were plenty of Merino sheep around back in those days (1950's), I have no idea what happened to their wool. It certainly didn't go into sweaters or into what was then known as long underwear! In Wyoming, where I grew up, the heavily wrinkled Merino didn't do well on the open range, where most sheep were raised in those days. Back then, the best return for sheep growers was to raise lambs for meat. Wool was a secondary byproduct--perhaps because it was so itchy?
Cashmere is made from the hair of a special breed of goat (Cashmere is to goats what Merino is to sheep) and is really soft and cuddly. A little googling found a woman's "lighweight" (no weight given) cashmere turtleneck at LL Bean on sale for $75. I remember being cuddly warm in the stuff but not sweating as I did in the wool sweaters my mother forced me to wear as a teenager. A little googling found a woman's "lighweight" (no weight given) cashmere turtleneck at LL Bean on sale for $75. Maybe it's just that too many people equate cashmere with luxury, so it's never been thought of as a base or insulating layer?
EDIT: After years of doubt I tried merino wool and it does not make me itch or break out in a sweat!