The Smartwool PHD Outdoor Light Micro Light Grey men's sock provides the same comfort every time you wear them. It is the best-fitting hiking sock that combines support, stretch, and recovery. The benefits include 4 DegreeT Elite Fit System, IndestructawoolT technology and Virtually SeamlessT toe for enhanced comfort. The light cushioned micro height sock includes mesh ventilation zones that provide optimum moisture management and maximum breathability. It comprises of 60% merino wool, 38% nylon and 2% elastane.