Our body enhancing body belt technology traps heat to help burn off extra water weight. The belt can help enhance the benefits of a workout and helps to support the metabolism for better a calorie-burn. For a tighter fit, order the next size down. Each of the hot ab belts provide core support which helps tone the body, contour the belly and supplements the strength of lower-back muscles to further promote good posture. May also relieve low-level back pain with the extra loss of weight. They are stretchy and breathable And the body belt contours and flexes for extra comfort.