One of the main reservations that I have with USB warmer products is the fact that they have to remain tethered to the computer, and many a times we get up from the desk without thinking about removing the connection, hence taking down that peripheral and perhaps even breaking the USB connector in the process due to the force generated. Not so with this pair of USB Cordless Warm Slippers from Thanko, as the $42 price you pay for them are well worth it – it hooks up via USB to warm up, and once they’re fully charged, just disconnect them and walk around the home/office without getting your little piggies all frozen and shivering. The internal lithium battery is good for a fair amount of time before they require a trip back to the USB port. It comes with a light indicator to let you know when is the next trip due for a power refill, and there is an option to change the temperature between low and high levels. Inside the slippers, you will find an ultra thin aluminum heater being used. If you’re nowhere near a USB port, you can always hook it up via a power outlet.