Originally Posted by
Bikewolf
Yes, you do need a windbreaker shell. Then your wool sweater can act as an isolating mid layer, on top of your base layer.
Sometimes, when I commute, I add a shirt with a thin wool sweater.
Remember not to wear too thick!
I usually need a couple of layers between my skin and the wool when I'm not riding, how does the extra exertion from riding change the itchiness of wool?