Material: leather + elastic bandSize: waist: 72cm/28.35"， shoulder: 35cm/13.78"Magnetic Massage Column: 12 pcsFunctions: in the cervical vertebra and lumbar area set up the far infrared health care layer and the magnetic massage head， promote the blood circulation， eliminate back pain and shoulder acid， prevent rachis deformation， prevent teenagers habitual kyphosis， head down on chest， etcSuitable for: long-term standing， sitting， in the same position for too long， all kinds of personnel who have sore shoulders， back pain.Package included:1 * hunchback posture correction belt