Heated shoes - GIF

Heated shoes.

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Previously:

Making shoes by hand - GIF
Making sisal shoes - GIF
Michael Jackson's anti-gravity illusion shoes - GIF and patent
Moonshiner shoes - photos
Pole climbing shoes - GIF

I was thinking it might be an electrc heater, but it is fire...

Not sure if smoked feet is on the menu but that's one way to do it!