The general practice is to sewn a warmer pad at a critical location (similar to the material of the electric blanket consisting of a coil and a special garment material), leaving a USB or other form of power interface connected to the mobile power source (usually a battery), in the cold Or under the harsh environment to play a role in heating and heat insulation.
It mainly includes coats and underwear.
Such as heating jackets, heating pants, heating vests, heating gloves, heating socks.
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