An article of headgear has a headband portion and ear covering portions which cover the ears of the wearer and pair of open ended pockets in the ear covering portions which removably receive and carry a packet of exothermic heat dispensing material to warm the ears of the wearer. In a first...http://www.google.fr/patents/US5809573?utm_source=gb-gplus-shareBrevet US5809573 - Exothermic chemically heated ear warmer
