The brim is a broken seed stitch to give a really textured feel and mimic a Cossack Hat.
The pattern is available on Ravelry as a download. It's a super warm hat written in 2 sizes: s/m 21" and m/l 23" (head circumference). Any super bulky yarn with a thick/thin quality would work well. It knits up really quickly as an added bonus!
Karine was gracious enough to test the pattern and model the hat for the pattern.Thanks, Karine!