A basic cowl.......

This cowl is made in rounds using a half treble crochet followed by one chain all the way round, with the next row being worked in the chain spaces from the previous round:

The basic stitch really shows off the pattern in this wool-bamboo mix yarn.
The ides for this came from here:
http://www.hopefulhoney.com/2013/10/basic-chunky-cowl-crochet-pattern.html