Hie-tori Socks Warm with a double structure Inner layer/Surface yarn: 100% silk Outer layer: Wool blend Hie-tori socks with a double-layered knit using silk, the fiber closest to the skin. For those who are busy or find layering socks troublesome, we've created functional socks that are easy to wear, knitting two pairs into one. The first layer, which touches the skin, uses 100% silk for the surface yarn, which excels in moisture absorption and release. The second layer, with a beautiful design, is a wool blend for warmth and insulation. These socks gently support your Hie-tori practice with the power of natural fibers. ヾ(╹◡╹)ノ" You can purchase directly if you have no questions. Thank you! 2023.02.18