Beauty America Contour Corrective Back Bridge - Magnetic Therapy - Black Color - One Size with Magnet Inserts Fits waist 32" to 46" and designed to help correct bad posture as it aligns the neck and spine 12 Magnetic inserts to assist in pain relief Invisible under clothing for him and her - Comfortable, discreet and easy to wear Developed by a team of orthopedic specialists it similar to devices used by medical professionals. Wearing this product for as little as one hour a day can help retrain you mind and muscles to support your back and stand taller.