Make Happy Heat Foot Warmer your very own comfort companion! Slide your feet into the Foot Warmer, sit back and relax after a long day of being on your feet with Happy Heat Foot Warmer. Plug in the AC adapter for 12-15 minutes then unplug the power cord. Enjoy the soothing heat. Detachable cozy fleece cover is machine washable. Happy Heat distributes hot remedy devices by transforming the traditional hot water bottle in a 21st-century technology to save time and energy.