Cold floors, long walks and drafty rooms lose their grip. A soft cotton sock with an electric heating element works quietly underfoot, so toes stay comfortable through a winter commute or an evening on the sofa.

The knit sits smoothly inside boots, trainers and slippers, and one size is cut to suit most feet. Choose the constant temperature version for steady, simple warmth, or the adjustable model when you want to change the setting as the day shifts. Both come in thermostat gray or thermostat black.

Power is flexible. A battery box, your own power bank or a 4000mAh lithium battery with charger all run the heating, and socks-only options suit anyone who already owns a compatible source.