Sometimes these unique designs just pop up and I run with it.  I did the scarf thing before with hoodies but this time started with a beanie.  Crochet is an asymetrical artform and will twist on you and cup.  So the circles are doing what comes naturally.

Acrylic/Polyester yarn
Hand wash cold
Fits head sizes 19" to 20"
One-of-a-kind (ain't no mo' of this yarn)