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As we wrote two years ago, insulation of the body is more energy efficient than insulation of living space. Because of its excellent insulating properties, modern thermal underclothing makes it possible to burn the heating at much lower temperatures without sacrificing comfort or sex appeal. The potential energy savings are huge, and the costs are almost nil.
This low-tech insulation strategy can also be applied to heating the body. In use since World War Two, electrically heated clothes have become more effective and comfortable in recent years. While their use outdoors increases energy consumption, heated clothes have the potential to save massive amounts of energy indoors.
Electrically heated clothing is used by soldiers, adventurers, hunters, winter sports enthusiasts, bikers and construction workers . Heated leather jackets were already used by pilots in World War Two. Bikers have used the technology for decades, using the battery of their motorbikes to supply the required energy.