In reply to Lego: Sounds like BS to me...
Static problems only apply when things are dry, or at least not conductable. I don't know about your feet, but my mine are pretty sweaty so WILL conduct electricity without any problem.
Ontopic: I either use one pair of very thick socks (like smartwool or the like), or 2 pair - a thin synthetic 'base layer' sock with an ordinary cotton sock over it. Both work fine, I've never, ever had blisters.