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RE: PolarSeal - Super lightweight Heated Jacket at the touch of a button
I don't think I have to worry about the cold if I wear these clothes in winter. It would be convenient because it has a long working time and can use a charging USB port. However, I am worried about what to do with the laundry, but it must have been well made.
@supergiant thanks for the review. There must be some mechanism to remove battery and heater for laundry.