The origin of Lorpen Technical Socks is located in Extalar. Lorpen Technical socks have all the little extras incorporated so that you can be comfortable while wearing the socks. They have an extra flat toe seam. These are the only technical socks that include Lycra throughout their whole structure so you won't have creases, abrasion, or blisters. Your feet stay fresh and dry with CoolMax®' and Merino wool gives you the high quality natural heat to keep your feet warm or cool. Try the Lorpen® Trekking Extreme Merino Wool Knee-Length Sock. The Merino Wool inner layer provides warmth and softness and the outer layer of Polyamid gives you the durability and strength. Lycra throughout keeps the sock in place. The Lorpen® Thermolite Liner Sock features an inner layer of Thermolite Base which keeps the foot dry and warm. The Lorpen XBT (X-Treme Bike & Trail) Coolmax Crew Sock is comprised of two layers.