Full cushion composition for extreme temperatures and weather conditions. ArmourDry pulls moisture away from the skin and pushes it through the outer layer of the garment. The embedded arch support reduces foot fatigue and bolsters circulation, while ArmourBlock helps prevent the growth of odor causing bacteria in the sock. 49% Acrylic, 23% Wool, 18% nylon, 8% Polyester, 2% Spandex. Black/Steel.