A FIT Bodywrap is a dual-action system. The first action is caused by the far infrared heat of the FIT Bodywrap. This heat does not make fat leave your body. Instead, the heat from a FIT Bodywrap actually breaks stored fat down and converts it into fatty acids that are used by your muscles for energy. As the FIT Bodywrap heats your body, you begin to sweat to cool down. This sweat is fueled by the energy from the converted fatty acids.