These are the only socks I use for my winter running, especially with Vibrams FiveFingers.

Proven in the simplest and most extreme conditions, the Performance series tetratsok is becoming the choice interface for amateur and professional athletes alike. Engineered with AIS: technology and constructed with a wicking fiber made of CoolMax® and a resistant outer shell of durable nylon, the Performance tetratsok protects, prevents and out performs any ordinary tube closed sport sock.