contour belt is a contraption that uses electric current to contract the muscles. This is claimed to be developed by the Swiss Medical Professionals. This product is also said to have a re-engineered approach to the electro muscular stimulation. The working of this belt goes like this. The brain controls the muscles by sending small electrical impulses through the nervous system. When the impulse makes its way to the right muscle the contraction of the muscle begins. This takes place until the brain stops sending the impulse. There are however pros and cons. The contour belts really build and strengthen the muscles but reducing the size of the waist is less efficient. This is so because, all the machines and devices of this kind only strengthens the muscles. Slim waists will require burning off the excess fat that covers the muscles. This device does not magically melt off fat.