This product will be simply packaged. Colors: Black, Red Length: Approximately 19 cm ********************************** I also use this product and love it. Thanks to this warmer, my ankles and calves stay warm, and I'm comfortable. I feel so warm that I even sweat during the day. The swelling that I was so worried about has also disappeared. Warm and cozy with a silk lining and an Angora touch There is almost no muscle around the ankles. However, nerves and blood vessels run just under the skin of the ankles, which lack muscle, making them susceptible to external stimuli. According to traditional Chinese medicine, there are many acupressure points around the ankles, and warmth is the appropriate stimulation for this area. The inside is a plain weave of silk blend, and the outside has a warm Angora touch with a double knit, making it fashionable and ideal for those who suffer from cold sensitivity. Also ideal for those who have trouble falling asleep due to cold feet. Recommended as a gift for the elderly and those who tend to get cold easily. Outer: Acrylic, Nylon Inner: Silk, Cotton, Polyester, Polyurethane [Silk Socks]