Karrying Kolor, I think the Bittersweet hemp color looks great for a cardigan. The yarns they use in the pattern are a wool/silk/cashmere blend that appears to be fingering weight, plus a strand of metallic polyester/rayon. The gauge might be pretty close with the hemp on a small hook. I wonder how the hemp would feel against the skin as a cardigan, though, since the stitches are so dense? I've never used that yarn before so I have no idea if it would be soft or feel like twine.