Here in the states fall is quickly creeping up on us.
The technique I learned here was making a hem, but I did it in a bunch of places all around the cowl. It's actually really easy to do! If you've ever done a three needle bind off, it's pretty much the same thing, but instead of a live stitch you're picking up a purl bump from a few rows below. Interestingly, as bumpy as the outside looks, the inside is completely smooth.