Thanko USB Shoe Foot Cooler - Worried about smelly or sticky feet this summer? Fear not, Thanko's got the answer! Keep your shoes, socks and sweaty feet breezy with the USB Foot Cooler, a tube that straps to your leg and then slips into your shoes. It's connected to a USB cable so you can power the ... Read more
Air-conditioned shoes might sound tacky, but they can actually help to prevent foot odor.
You can also use this USB shoe foot cooler with your ordinary shoes.
https://www.japantrendshop.com/thanko-usb-shoe-foot-cooler-p-1449.html
It has been done in Japan.
https://www.nasdaq.com/articles/japanese-invent-air-conditioned-shoes-2011-07-28
I found a patent for one!