This ought to get some fired up discussing the advantages of wool, one way or another :) All three pounds of it! coldthistle.blogspot.com/2011/05/dachstein-wool.html
I do remember those--wayyyy heavy. But I still use their mittens--warm when covered in ice!!!
I have that very sweater. Still gets used quite a bit. The comfortable temperature range is quite broad. Only thing it isn't good for is true driving rain. Otherwise, in cool to cold weather, it's a good piece of gear.
Dachstein wool mittens with some OR gore-tex shells are great for very cold and windy weather.
I can't think of anything that wool does better than modern synthetics. Except maybe exude old-school charm. Kinda like a Ventile cotton anorak. It's heavier. Takes longer to dry. Smells like a wet dog. Stretches out. Having said that, you'll get my Dachstein mitts when you pry them from my dead fingers. Ditto my Woolrich Malone pants, and Peter Storm oiled wool sweater. (That's about 10 POUNDS of sheep hair)