【Instant Temperature Sensing in 3 Seconds, No Code Needed】Electric Slippers Foot Warmer with 2 x 8000mAh Batteries, NTC Overheat Protection, Heats Up in 30 Seconds, Walk Freely, 3-Level Temperature Adjustment, Electric Foot Warmer, Cold Weather Protection, Indoor Wear, Washable, Unisex, with Japanese Instruction Manual (Gray, M) 【Two Heating Areas (Top and Bottom) & Equipped with 8000mAh Batteries】The 2025 winter improved electric slippers have heaters distributed on the upper part of the toes and the soles of the feet, wrapping both feet in warm heat. This allows you to maintain a good state of "cool head, warm feet." The Japanese-made heater is used, and during heating, the temperature is evenly distributed on the heater, significantly improving safety, heating speed, and durability compared to last year's heater. Upgraded from last year's 6000mAh battery to an 8000mAh large-capacity battery, the usage time has been greatly improved. 【NTC Overheat Protection & Indoor Walking Possible】An NTC overheat protection chip is installed inside the main body, and the safety during use has been greatly improved, such as automatically turning off the power when the heater temperature exceeds 75°C. In addition to eliminating the hassle of complicated wiring, the foot warmer comes with two batteries, allowing you to walk around indoors without being near a power source, thoroughly solving the problems of many people. And, by simply pressing the power button, the three temperature modes can be switched. Low temperature mode: the button is green, the temperature is about 45°C. Medium temperature mode: the button is blue, the temperature is about 55°C. High temperature mode: the button is red, the temperature is about 65°C. 【Excellent Material & Non-Slip】The surface is not only wool, but the inside has a brushed structure, which sufficiently keeps your feet warm. The electric slipper body is made of a material that does not fade or shed. Non-slip particles are attached to the bottom, preventing slipping on wet indoor floors, making it suitable for use when dragging on the floor. 【Energy Saving & Fully Washable】Economical electric slippers only cost 0.32 yen per hour. In the case of winter heating, a very large amount of money can be saved. Even if the electric slippers get dirty, they can be washed. Just remove the battery and cover the DC port with a lid, and the electric slipper body can be safely used in the washing machine, and hand washing is also possible. Approximately 300g (excluding battery weight). Material: Polyester fiber. M size (22~24.5cm), L size (25.5~28cm).