New colors for the double-layered "Silk Wool Double Layer Socks", which use 100% high-quality silk yarn for the inside that touches the skin, and 100% merino wool yarn with high heat retention for the outside. is now in stock. Although it is mid-length, it has the thickness of two layers, so it will keep you warm and hold your entire foot, so it is recommended for those who get cold feet during the cold winter months. Please see the product page for details.