The flex belt works through electro muscle stimulation principle and passes the electric impulses through the three pre-positioned gel pads contained in the belt. Once the gel pads wear out they have to be replaced with another set of gel pads that come at the cost of $14.99 per set. The gel pads come for nearly 30 sessions of workout. There are also some discount coupons offered in few online websites, which you can utilize to purchase the flex belt. The actual cost of the flex belt is $199 and is designed especially to tone the abdomen. If you require having full body workout you can use flex belt along with other flex products such as flex mini and flex arms. If you order these two products along with flex belt, they come at a price of $129 each otherwise they cost about $199 each. Sometimes the website offer free gifts along with the purchase of flex belt which happen seasonally.