David Peacoat by Melissa Mall of Inner Child Crochet. You can also find the pattern through Ravelry (and add to your project library) HERE.
The hat pattern is my own, which you can find HERE.
Caron Simply Soft Brites yarn- Color Blue Mint
5.5 mm hook (and I used a 5 mm hook to make the foundation chain)
about a 17 inch chest circumference (I managed a pretty spot-on gauge to the pattern)