M size posture correction belt, made of polyurethane and nylon for comfortable wear. Purchased on Amazon in 2021 for around 2400 yen, and stored at home after using it for one month. The following is a copy of the product description from the purchase history: --------------------- This product is designed based on human engineering. It is a posture correction belt supervised by Mr. Inohara, a judo therapist and massage therapist who knows the human body inside and out. Seller: Triple S - Size: M - Material: Polyurethane, Polyester, Nylon, Cotton Thank you for viewing.