I always take mt merino wool crew neck and zip cardigan for fall travel to Italy. It is quite warm without being itchy. It also does not wrinkle. Wool X is a brand I really love.
Surely these items are worth taking as layers in both fall and winter to many areas besides Italy. The Packing section of the forum has been recommending merino products for several years. I also wear merino items at home in winter.
Last year I bought a yak cardigan from Quince. Love it! It kept me warm with and without my rain coat in Ireland and South of England tour this summer.
Quince didn’t bring back yak cardigans this year but again have crew and turtle sweaters. About half the price as cashmere.
I don’t wear wool because my hubby is allergic to it. There’s not much need for sweaters in Phoenix.