FeelinGirl Women's Adjustable Waist Trimmer Belt Stomach Body Wrap Belly Fat Burning with Magnetic Films Spandex 78%+Rubber thread 22% Steel boned belt help you improve your posture.Magnetic Films have a great function of keep you healthy. Material: Spandex 78%+Rubber thread 22% You could take this waist trimmer belt for sports,working even at sleep! It would improve your figure unwittingly. High qualiy only sell by FeelinGirl Trademark. If offer by other sellers will be difference item. The quality is not the same Do not use default Amazon Size Chart. Choose size mainly based on your waistline measurement.If you are not sure about your size,please contact us with your bust,waist,length from shoulder to hem and hips measurement.