This is a health device designed to be wrapped around the pelvis for exercise and shaping. I apologize that I cannot provide detailed information about the product name or how to use it, as there are no instructions! I remember the instructions were something like: Wrap this belt around your pelvis. Stand straight. Place your hands on your waist. Rotate your stabilized waist in a circular motion! ✧• ─────────── •✧ Thank you for viewing. Please read my profile before purchasing. ✧• ─────────── •✧ There are no issues with using it, but there are stains like those in the photos, and it has been used to some extent. Please understand that this is a used item that has been stored at home for a long time. Returns are not accepted. ✧• ─────────── •✧ Please note that the price reflects the shipping cost due to the bulkiness of the item. Thank you for your understanding!