New, Unused KEYUCA 4-Layer Socks Made in Japan Size: 22-25cm By layering natural silk and cotton alternately, these socks keep your feet warm while maintaining breathability. Even with four layers, the loose elastic at the opening provides a comfortable fit without feeling tight. Layer 1: Silk 100% Layer 2: Cotton 100% Layer 3: Silk 100% Layer 4: Cotton 100% I received these as a gift but am not using them, so I am offering them for sale. They are unused and unopened, but please note that they have been stored at home. Therefore, if you are particular about details or seek a perfect item, please refrain from purchasing.