◆ Socks That Keep Your Feet Warm - A Miracle! 　Regular Socks, Ultra-Thin 　23-25cm 　Black Warm even though thin because of the special heat-retaining fibers throughout Comfortable and not stuffy with a 2-layer structure ✅️ I accidentally opened the package, but they are unused, so I'm selling them at a discount. Please refrain from purchasing if you are overly concerned about details.