Rototo - Double Face Silk Cotton Crew Sock - Light Orange, Gray. If you want a pop of color without having to be too flashy, this is the sock for you. It's also incredibly comfortable. The silk blend makes this feel like butter don't the foot. The extra peaks of texture in the grey section of the sock make these super fun to pull on every day. Produced in the main in Koryo town in the Nara prefecture, this two-layered sock is created using a rare specialist knitting machine that allows for two different yarns on the outside and inside of the sock. This sock is silk rich, the undyed silk is knitted into the pile of the inside of the sock. Silk is made of a protein similar to human skin creating a soft and gentle feel to the sock. Comfort is at the forefront of this sock design. Made in Japan.