The cheapest pink shoe warmers of death.

This is a different style of shoe warmer. Most notable features of this pair are the complete lack of an earth connection on exposed metal plates with very hot components on them insulated by a wrap of Kapton tape, held in place by sharp riveted metal plates and with the plain PVC insulated wires soldered directly to the sawn-off PTC elements that look like they've been scribed and snapped to allow one PTC element to be used in both warmers.
The rather cute but dubious cable splitter has it's own over-run heater inside too, in the form of a 150K resistor in series with a red LED slapped right across the mains. (240V)