USB Warmer Slippers" is one of another new USB items among Leso's...USB Warmer Slippers help you to keep your feet always warm, and maximize your productivity. It is safe, since the slippers warm your feet gradually while working on your computer. Simply plug the USB slippers/USB feet warmers into a USB port on your PC or laptop and heat your feet. The USB slippers can be operated by USB power. Once used, you will wonder how you ever managed without a pair. Once they are plugged into a USB port, they quickly heat up and are ready to wear. Once heated to a nice cosy temperature, they maintain that heat until they are unplugged from the USB port. A good quality soft, flexible and comfortable slipper with the benefits of added warmth to keep your feet and toes happy, whilst you use your PC or laptop for pleasure or work.