Recently we lucked out with a big stock of vintage Irish and Scottish sweaters with a mix of Fair Isle, Shetland, and British wool. All of them are that strong wool you'd expect from the northern isles and would make perfect layers to survive the harshest winters.
You don't often see patterns like this with vertical stripes. Relish the rarity. Note there are a couple brown spots on the front and cuff, but otherwise good vintage condition.