All conventional clothing and bedding uses the same basic method to preserve warmth. They retain heat by trapping it against the body and delaying its escape - which works moderately well within a narrow temperature range. But when the environment is colder, the heat loss increases, and your covering can't keep you warm enough. Conversely, when the weather is warm, not enough heat is lost, and you can be uncomfortable under the covers.

Clothes or blankets filled with commonly used insulating materials are a variation on this principle.

Electronically heated clothing and blankets provide warmth artificially, but they're less than a perfect answer. They supply a steady heat no matter how hot the body gets under them. They can fail mechanically. And they're not entirely free of fire or shock hazard. Only Nikken Far-Infrared Technology offers a natural, comfortable source of warmth, for all-season comfort.

Actual thermographic photography shows the way that Far-Infrared Technology helps to control temperature. Compare these two photographs that register body heat in different colours. The first image shows a person wearing an ordinary cotton material. In the second, the material contains far-infrared, ceramic-reflective fibres. Notice the difference in temperature, as indicated by the colour change.