The waist trainer belt akin to a girdle, shapes the midsection tightly to aid weight loss by retaining body heat and inducing water loss during workouts. It offers immediate abdominal compression and lumbar support with its comfortable lightweight stretchy fabric and adjustable hook and loop strap. This purple and black slim waist trainer belt measuring approximately 40 inches long and 8 inches wide is ideal for various activities such as jogging running cross training hiking biking gym workouts and horse riding. Dimensions Approx. 7.75 in by 40.5 in by 0.25 in Outer Material 88 percent Nylon and 12 percent Spandex Inner Material 100 percent Rubber.