From the Knit Picks Website:
Done in the rich deep color of Wool of Andes, this is sure to become a favorite hat. The really fun part for the knitter is to be able to cross stitches over without the extra needle. Once you manage that skill, you’ll go cable crazy!

Needles:
Size 11 (8mm): 16” circular
Size 11 (8mm): DPNs