Optimal Gift: Say good bye to the cold and keep the warm of your feet with our useful Electric Heated Sock. Machine Washable: Put the plug in the sock pocket and put it in the laundry bag before washing.
eBay
It also displays the heating levels. L1/L2/L3/L4 for single-sided heating. H1/H2/H3/H4 for double-sided heating. It's a life saver for outdoor workers and Raynaud's arthritis sufferers. No more cold hands!
eBay
eBay
(Patented product, Pat. US11916334).
eBay
【 SAFE AND WARM SOCKS】 Heating socks was made of high-quality cotton fibers, insulation provides you with safe socks, stable temperatures that stimulate blood circulation on your feet and keep your feet from being cold and stiff in the winter.
eBay
eBay
Skin-friendly design for greater comfort. Double Press to Check Battery Level. （Blue light display）. Press and hold the power button for more than 3 seconds to switch on/off. (Red light display). Short press on the on/off button to adjust the temperature by 3 levels.
eBay
eBay