User Review: Ibex Men's Shak Jersey
The Ibex Shak is to the sweater what the Porsche is to the automobile.
Actually, the Ibex folks probably wouldn't want me calling it "sweater" at all. But that's how I use it -- as a light, warm, close-fitting, high-performance wool mid-layer. With the Shak, I don't get too hot (which I do with heavyweight sweaters, like Filson's) or too cold. I wear it over the Ibex Zephyr, which I typically use as a base layer; excellent combo.
I wish it were a little less close-fitting (if you're skinny, this will be a non-issue), but otherwise a first-rate item.