Stimulate your core wherever you are with an electronic waist trainer. If you're worried about fit, slim designs provide discreet coverage beneath workout clothes, and adjustable closures ensure comfort the whole day through. EMS technology stimulates your abdomen, causing the muscles to contract and relax repeatedly, so you can burn more calories and gain more muscle tone. Built-in controllers with LCD displays offer easy operation, and app-controlled belts allow you to control features with your device.