From the Knit Picks Website:
A quick to knit 2 color felted hat was the plan, something that could be interchanged with the Felted Hat with Brim Variations which I was working on. A mistake happened, mixing Swish and Wool of the Andes, and this hat is the result. So, now you have a choice – try a Wool of the Andes 2 color beanie, or have some fun by mixing a little Swish into the game!! The Swish is corralled by the felted Peruvian wool floats, so the texture of the stitches puffs out a little.

Needles:
Size 5 (3.75mm), Size 7 (4.5mm), Size 10 (6mm): 16” circular
Size 10 (6mm): DPNs