Simultaneous charging Foot warmer is powered by a 3.7 V/4000 mAh battery, 1 cable and 2 charging ports can be synchronised to charge the battery, which can be used for 3-4 hours on the highest heat level for a long service life.
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Hidden pocket On both sides of the heated socks there are pockets for the battery, and the outside is equipped with a buckle that does not fall off easily and is easier to wear.
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Powerful washing machine The heated ski socks can be washed by hand or in the machine. Please make sure you put the heated socks in the included laundry bag before machine washing and do not wring out by hand.
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