warmed insole cold protection in winter self-heating insoles warmed insole disposable foot warmer heating stickers wholesale in stock

Product Name: Self-heating Insoles

Average temperature: about 45 degrees
Duration of fever: 5-6 hours
Main components: iron powder, activated carbon, vermiculite, inorganic salts, purified water
Product Size: Women's (35-39) Men's (40-44)
Warnings and Suggestions:
Before use, expose the shoe insert to the air for 30 seconds to heat up more quickly.
This product begins to heat upon contact with air. Do not disassemble when not in use.Open the individual packaging
Before use, there is no need to tear off the shoe insert paper board or rub it. Just put it directly into the shoe.
· When exposed to the external environment, the temperature will be appropriately increased, and the duration will correspondingly decrease. Disposable products, use and discard after use, please pay attention to protecting the environment.