Imagine a personal heating system that works indoors as well as outdoors, can be taken anywhere, requires little energy, and is independent of any infrastructure. It exists – and is hundreds of years old.
Most modern heating systems are primarily based on the heating of air. This seems an obvious choice, but there are far worthier alternatives.
The arrival of compact lithium-ion batteries has increased the performance and diversity of electrically heated clothing.
Modern thermal underclothing offers the possibility to turn the thermostat much lower without sacrificing comfort or sex appeal.