I couldn't even stand eight hours of it. More like two hot hours. I had to stop my work and take off my shoes to take off these foot warmers. I use hand warmers all the time but they have a different formula or something. They get TOO hot. Someone can actually burn themselves on them if they are unable to remove them themselves. There may be a warning on the label about this, but I'm here to say take it seriously. It feels like these things can really burn someone. I was worried they might melt certain materials, like the man-made materials in my socks or coat pockets. I can't seem to find a window of time when they aren't too hot. After a period of scorching heat, they appear to be warm for a while, but they go from boiling hot to completely cold very quickly. I was wondering if I received a defective box, but all my friends declined my offer to take some "because they're too hot". So I think other people already knew. I didn't read the reviews because I assumed they were the same as the hand warmers I LOVE minus the packaging in a different shape with added adhesive. But something else is happening, causing them to get dangerously hot.
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