@slimepsychic @disability I use a heating floor pad for my feet, it's branded "Heatek" but I'm fairly sure it's just a generic (albeit durable) heat pad.

I do use it with https://www.aliexpress.com/item/1005001425953521.html, because the built-in temperature threshold is a little too high, and it causes pain if used that way for extended periods. I now have it set to 30-31 celsius, with the probe located under the pad in the middle, and it's perfectly comfortable!