I’ve done a lot of scarves in Cartridge rib, but always flat. I like it because it’s a bit mindless with no purling. However, I wanted to knit this in the round, so yes, there is purling. I have some leftovers from a huge yarn sale of a friend’s stash, and she happened to have 3 small balls of Rowan Kidsilk Haze in red tones that went nicely together. I held it along with the Brown Sheep LP Worsted, the lightest, then the medium, then the darkest. When I ran out of the darkest, I bound off. It’s a big warm slightly fuzzy cowl. I actually like the lightest color best with the Brown Sheep, but this was a use-it-up project, and I’ve very pleased with it.