This möbius cowl reminds me of water running through a water wheel. Garter-stitch bands look as if they slow down the water-like flow of the cables between them. The play of garter and cables creates an undulating edge.
The cowl is not only beautiful; it also teaches you a number of skills. You can learn how to create simple, reversible cables so that the front and the back look the same. (Since it’s a möbius, both sides show.)
The cowl is knit to fit; work until it is your size, then join.
The ends are finished with one of two options: Kitchener stitch to make the join completely undetectable, or make a scarf. Simply omit the joining.