It does what it claims to do.....make you sweat. THAT'S IT. I followed the instructions to the letter and lost no pounds or inches. It is extremely uncomforatble. You cannot sit down while wearing it, for fear of burning your skin. You must drink only warm liquids while wearing it, apparently to keep your body temp equal. It really is a GREAT marketing gimmick, I wish I had thought of it. Don't waste your time or money on this ridiculous gadget. Just eat right and exercise.