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2. Hand warmer - Wikipedia

   en.wikipedia.org/wiki/Hand_warmer

   Crystallisation-type hand warmer with scale showing metal disc trigger Short clip showing the activation and crystallisation of a crystallisation-type reusable hand warmer. This type of hand warmer can be recharged by immersing the hand-warmer in very hot water until the contents are uniform and then allowing it to cool. The release of heat is ...

3. Muff (handwarmer) - Wikipedia

   en.wikipedia.org/wiki/Muff_(handwarmer)

   A muff is a fashion accessory for outdoors usually made of a cylinder of fur or fabric with both ends open for keeping the hands warm. It was introduced to women's fashion in the 16th century and was popular with both men and women in the 17th and 18th centuries.

4. Hand warmers - Wikipedia

   en.wikipedia.org/?title=Hand_warmers&redirect=no

   From Wikipedia, the free encyclopedia. Redirect page. Redirect to: Hand warmer; Retrieved from " ...

5. Catalytic heater - Wikipedia

   en.wikipedia.org/wiki/Catalytic_heater

   John W. Smith, President of Aladdin Laboratories, Inc. of Minneapolis was awarded a US patent for a product called the Jon-e (pronounced “Johnny”) catalytic hand warmer on December 25, 1951. Production peaked in the fifties and sixties, at 10,000 warmers a day. Aladdin went out of business in the 1970s. [4]

6. Heated clothing - Wikipedia

   en.wikipedia.org/wiki/Heated_clothing

   The warmers are about the size of a package of cards, and they contain chemicals which produce heat. One traditional hand warmer is a small metal box containing charcoal which, when lit, burns very slowly and produces a mild heat. Disposable heat packs typically contain cellulose, iron, water, activated carbon, vermiculite, and salt.

7. Heating pad - Wikipedia

   en.wikipedia.org/wiki/Heating_pad

   A sodium acetate heat pad. Disposable chemical pads employ a one-time exothermic chemical reaction.One type, frequently used for hand warmers, is triggered by unwrapping an air-tight packet containing slightly moist iron powder and salt or catalysts which rusts over a period of hours after being exposed to oxygen in the air.