I've made a few cowls in the last little while, and thought I should post a pattern,
These are super quick to make and super warm!
I used an N hook.
Ch80. Join together to make a circle.
Rows 1-15: ch4, lazy quad in each stich.
Continue for 15 rows, or until you've reached your desired height.
Crab stitch the top and bottom to finish off.
Here is a pic:
If you try it, let me know how it turns out!