Thin,NOT Waterproof : Please note the usb heating shoes are Thin and lightweight, it only suggest for indoor use. The sole is plush, but not water resistant. Not suitable for rainy outdoor use.
USB Heated: Quick heating and high temperature. The highest temperature can reach 55℃. With the working voltage of 5 V, saftety to use. And you can plug into the pc and notbook usb port,power bank.Or USB adaptor(such as cellphone adaptor).
Pink medium For women(EU35-39): Boot Length 23cm; gray large For men(EU39-43): Boot Length 27cm. Electric foot warmer shoes has soft lining, and is wear and non slip. So you are able to wear them for a long time.
You are able to use USB adapter to heated foot warmer shoes. When you are in car, you can also use car charger to power electric shoes.
Heating booties are comfortable and when you warm it on feet, you will feel comfortable , and you will not be got frostbite in winter.