In Gudrun the designers words "The cowl is worked in rounds, starting with a provisional crochet cast on, knitting a repeat of 30 stitches over several rounds and several repeats. The result is fully reversible, providing a beautiful graphical look on both sides.
The instructions are given for fingering yarn, but you can easily adjust the pattern for almost every yarn you intend to use. Just make sure, to swatch and accordingly adjust the number of stitches for your cast on. I highly recommend solid or semisolid plied, light yarns, creating a visible stitch definition.
The pattern is fully written and also charted, offering the chance to play with textures and colours.