Insulation against cold – one minute survival tip

Air has a low thermal conductivity but is very mobile. There are thus two elements that are important in protecting from the cold:

1: stopping the wind from penetrating and replacing the layer of warm air close to the body;
2: setting up a layer of still air which serves as insulation, by the use of dry leaves et cetera. The body continually warms this layer of air close to the body.

Remember: Warm the center of the body first—chest, neck, head, and groin.
Areas with large blood vessels, particularly around the head, neck, chest and groin, are more susceptible to heat loss because those blood vessels don’t constrict as effectively as the smaller ones near the skin. That’s why proper winter attire includes a hat, scarf and coat.