Feels like you're in an Onsen (Hot Spring) IFMC. Onsen Socks Room socks that feel like you're soaking your feet in a foot bath The warm, foot-healing socks are processed with IFMC. (IFMC: Accumulated Functional Mineral Crystal), minerals derived from hot springs. Just like soaking in a foot bath, warmth continues to your feet. Adopts fluffy, comfortable pile knitting The warm, foot-healing socks use pile knitting, which raises loops like a towel, providing excellent cushioning, heat retention, and water absorption. Because they contain plenty of air, they are light and very warm, with a fluffy feel and soft elasticity for a comfortable finish. Furthermore, they absorb sweat well and are less likely to get stuffy, keeping you comfortable to wear. 【Size】 ・22cm～24cm 【Color】 Beige What is IFMC.? IFMC. (IFMC: Accumulated Functional Mineral Crystal) is a nanometer-level, very small mineral crystal manufactured by Teikoku Seiyaku Co., Ltd., focusing on hot spring therapy. It is a substance extracted by combining several kinds of minerals and immersing them in iron-rich hot spring water for a certain period of time, and then specially treating the eluted liquid. By wearing it on the body, improvement of balance, recovery, and performance can be expected. It is used by many athletes, including professional baseball players, and research is being conducted at the Mineral Crystal Research Center of the Tokyo City University Research Institute, aiming for application in the medical and nursing care fields. It is also used in the sports brand AXFaxisfirm.