Ketmart Vest uses a heat-trapping polymer fabric to boost your natural body heat and stimulate sweating with any type of physical activity. Your core temperature rises, so you'll feel a hot sauna-like experience that will quickly enhance your sweating.The all-new fat burning garment that uses your natural body heat to promote sweating. So you can burn more calories and shed pounds fast! Look, Sweat Shaper is made from a special blend of compression and polymer fabrics which work to seal in your natural body heat. Creating an intense, sweat inducing, sauna-like experience when working out or by simply doing everyday activities.