"Socks Suppli: Just Like a Kotatsu Ankle Warmer" Color: Black There is some pilling. Some of the stitching on the toe side has come undone. There is no problem with wearing them. Please purchase only if you understand, such as those who want to try them out or those who don't mind the condition. * Gently and softly wraps your toes, Warmth as if you were in a kotatsu (heated table) Using Okamotosan's uniquely developed special heat-retaining and heat-generating material, We've created warm and cozy socks! The secret is the warmth stimulation around the ankles! The ankles, which tend to draw in coldness, are firmly covered with heat-generating material. Warms and stimulates the San'in-ko (acupressure point) area.