Black Cat Fundoshi - Men's Cup Type - Adjustable String This single item can be worn in two ways: as a Black Cat Fundoshi or an open-back fundoshi. The Black Cat Fundoshi is a type of traditional Japanese fundoshi, and can be considered the original T-back underwear. T-back underwear has existed in Japan since ancient times. It is thought to have been devised based on the Rokushaku Fundoshi, making it easy to wear. The "Black Cat Fundoshi" is characterized by its easy wear, stability during vigorous movement, and minimal slippage, making it suitable for use as a sports supporter. Those unaccustomed to T-backs may find the fit around the buttocks a bit uncomfortable at first. For those concerned about the fit, the open-back version of the Yoro Modern Fundoshi is recommended. It is also recommended for those who are concerned about panty lines showing through their outer clothing. The string model uses stretchy T-shirt yarn for the string (mits) part, providing a feel similar to G-string underwear. You can choose between the string model for casual everyday wear or the bleached cotton string model for a tighter fit, depending on your needs. Body: Canvas fabric (slightly stiff) String: Stretchy T-shirt yarn Note: If you wish to change the fabric, please provide the fabric number when purchasing. Sizes are available in M, S, and L. If no specific changes are requested, the product will be made with the fabric shown in the photo and in size M. (Note) * Production begins after the order is received. * T-back set: Tie a double knot at your preferred position, and use each string separately from the knot. * The open-back expansion kit can be used to wear it as an open-back fundoshi. #fundoshi #fundoshi #Fundoshi #unisex #YO-RO #handmade #Japanese #lingerie #frontpad #loincloth #Etchu #Yoro #YoroFarm No stains, tears, or odors.