The soft warmth of Merino wool blends with the smooth, lightweight durability of acrylic in this breathable, moisture managing sock. Merino wool is naturally thermoregulating to keep you warm when it's cold and cool when it's warm. Spandex compression arch holds form and adds support Fully thermalined construction absorbs shocks and insulates Reinforced toe and heel add durability and longer sock life Smooth, flat comfort toe seam 50% acrylic, 31% nylon, 17% Merino/wool blend, 2% spandex Style #2198