"I've worn it to work, playing softball, tennis, exercising, and just about anything I want to do. My weight dropped 16 pounds!" According to the gushing "real people" in this 1981 ad, the rubber Waist Belt System was an easy, quick way to ditch inches from your midsection.
An unnamed scientist claimed the "invigorating" and "distinctive" (yes, I would say so) Waist Belt holds in body heat, "causing excess fluids in the body's tissues to literally 'melt away.' "
See the full ad here.