I am selling this item because the size didn't fit. I tried it on, so it has been opened, but it has not been used, so it is almost new. Product Features and Basic Specifications Features: This product was devised based on clinical data from a medical doctor. It is excellent at reinforcing abdominal muscles and increasing abdominal pressure, reducing the burden on the lower back by about 30%. It has the effect of reinforcing the pelvis. By tightening only the lower abdomen, the feeling of compression is reduced, making it easier to move. Uses: For men, outerwear, innerwear, for preventing lower back pain during standing work, handling heavy objects, etc. Note: This belt is for the purpose of preventing lower back pain and is not for treatment. Color: Black Material: Nylon mesh, natural rubber Size: 3L Weight (g): 310 Waist (cm): 104～112 Retail Price: 8,492 yen