Yeah, you like the added warmth of two pairs of socks, but when your toes aren't getting any blood because that bulky extra pair is cutting off your circulation, get the Icebreaker Men's Hike Liner Crew Sock for extra warmth and feeling without all the bulk.
Merino wool, nylon, Lycra blend
Achilles and instep support
LIN toe seam
Breathable flat zone