8. The Personal Sauna Suit

Why spend hours at a spa when you can boil yourself alive at home? That’s what a 1940s full-body vinyl sauna suit promised. It looked like a hazmat suit inflated with a hairdryer. Once zipped in, users cranked up internal heat to “sweat out toxins and pounds.”

Unfortunately, most users just ended up dizzy, dehydrated, and humiliated. One woman fainted mid-sweat and had to be cut out with scissors. Despite the obvious risks, people loved it—for about five minutes. Modern detox fads walk so this suit could melt.

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