A carbon fiber heating sheet at the bottom of foot heats your socks when you turn on the power, 50°C constant temperature, can keep your feet warm during ice fishing, hiking, skiing and working outdoors in winter.Note: The temperature of socks without battery are constant, approx.50°C. Just connect the socks to your Power Ch-arge Bank with the transferred wire provided.Specifications:Material: CottonColor: Black with battery / Grey with battery / Black without battery / Grey without battery (optional)Suggested feet size(CN): 35-44Product Weight: 99.2 g / 3.5 ozPackage Size: 16 * 8 * 8 cm / 6.3 * 3.1 * 3.1 inPackage List:1 * Pair of Socks2 * Transfer WiresPower Ch-arge Bank is Not included.
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