Specialised clothing and equipment for warmth and cooling
Refer to DLF Factsheet - Dressing for warmth. Clothing keeps people warm by acting as an insulator, or more accurately by enabling air to act as an insulator. A garment traps air between it and the skin. This is then warmed by body heat and effectively prevents further heat loss. To be really warm, the whole body needs to be insulated. While warm hands and feet may be the key to feeling comfortable, body warmth is actually achieved by keeping the trunk and limbs well covered. Thermal clothing is available from good outdoor, camping and sports shops and catalogues.