Well, yes, it is. Fat sellers claim that it causes a reduction in fat cells or some such BS. It's really just temporary compression. Maybe a bit of reduction in surface inflammation, IDK.  Let's say a thin girl wanted to wear a very tight dress to some event. She could use this and, theoretically, be a bit thinner for that one night.  It all goes back to normal in a day or so. Fat women enjoy the delusion that anything but eating less will make them thin forever.