Silk Socks for Cold Feet While Sleeping - 22cm~26cm - Pink - Made in Japan Marutaka Silk Co., Ltd. These socks are gentle and warm, leaving your skin feeling soft. 93% Silk (100% silk for the outer yarn), 5% Nylon, 1% Polyester, 1% Polyurethane Size: Free Size (22cm~26cm) Approximately 25cm from the opening to the heel. Unused, but the plastic packaging is torn.