Ideal for keeping elderly people warm against the cold in winter and also for motorcyclists, mountaineers, skiers, hunters, and fishermen. Good for those who have poor blood circulation with icy hands and feet. With ultra-thin, flexible and super-conductive heating elements inside the vest (1cm plug, two battery cases, eight batteries, and a charger). Simply put the battery case inside the pocket of the vest and plug in the heating element, which takes only 20 seconds to heat up to 50 degrees and maintains a constant temperature.
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