I got the original pattern from one of favorite tumblrs allaboutami.tumblr.com. (I should follow more crochet craft tumblrs haha).
I used Caron Simply Soft in a tan-ish color and a size H hook.
And then you start puff stitching in every other single crochet space. (In the picture you'll see every space, but trust me, I've started and restarted this many times, and puff stitching every space is insane, and you will use up way too much yarn. So unless you want a very dense and stiff hat, every other sc is good.)
I kept going in the round until I felt like it was long enough. My problem is that I hate counting and measuring so I just wing everything, and that's probably why I have many problems sometimes. I should really keep track of rows, stitches, and length better, but anyways, see the original pattern on allaboutami's tumblr for more specific instructions.
You sew the top together by stitching across one end to another to make like a star shape, and you're done!
After finally finishing my first one, my boyfriend also wanted one so I made him one too.