For this one, I had to send a self addressed stamped envelope, but it was worth it. Stance makes some of the best socks around. I am a fan of the Star Wars collection. these are great!
Simply send a Self Addressed Stamped Envelope to:
193 Avenida La Pata
San Clemente, CA 92673
While you are at it it, you should check out their site at http://www.stance.com