Konomi Heel This type is worn inside tabi socks. It is not visible from the outside. The description says to use special tabi socks, but I had no problem wearing it with other tabi socks. I have only used it once. Since it is a used item, please consider purchasing it if you understand. The material is not specified, but I think it is silicone or rubber. How about for coming-of-age ceremonies, weddings, or other occasions where you wear a kimono? After packing using recycled materials, I will ship it anonymously. Thank you for your understanding and purchase. Thank you for looking.