Body slimmers are becoming very popular nowadays, especially among women who need to shape up days before a big event in their lives. It's a type of underwear that controls the bulges from being visible through the clothes by tucking it in with the use of a special fabric that tightens the mass as close to the body as possible. And depending on the type of fabric used, some body slimmers may also cause a sauna effect for the person wearing it, allowing for weight loss as the same time.