Heat insulation regulating method for e.g. sleeping bag, involves compressing insulating material within outer cover, such that air content of insulating material is changed to change insulating characteristic of material

摘要

The method involves compressing an insulating material within an outer cover, such that an air content of the insulating material is changed to change the insulating characteristic of the material. An effect of the insulating material depends on maximum stabilization of air than a heat insulator. The material is provided in an inner, flexible, compressable, foldable cover, which is compressed and decompressed with its content.