The big chill by dirttime is a quick guide on hypothermia and how to treat it. Their article covers:
- How You Lose Heat to the Environment using examples of radiation, conduction, convection and evaporation.
- How your body regulates core temperature by vasoconstriction and vasodilatation(the constriction and dilatation of the blood vessels), sweating, and shivering.
- Signs and Symptoms of Hypothermia by describing the symptons of mild, moderate and severe hypothermia.
- How to determine if someone is suffering from hypothermia
- How to Treat Hypothermia
So most of the bodies heat is lost threw the head,so it would be a good idea to wear a hat during winter adventures.