The insulation rescue blanket is so good that it is not used in clothes?
Today, I watched a movie in which a silver thermal insulation rescue blanket appeared, thermal blanket is a must for every field worker, in a cold environment can maintain body temperature to save people's lives, so I thought this thing is so good and thin, why haven't I seen it in some of the clothes we usually wear? For example, isn't it better for clothes with a thermal blanket in the middle than a heavy down jacket? Thermal blankets are cheap again, and the cost has come down, why is there no such dress?
Two major features of the rescue blanket: high reflectivity material reflects heat radiation + completely airtight wind and windproof: there are too many soft shell / hard shell / skin clothing to choose from, not to mention reflected heat radiation: Colombia's Omni-heat has been launched for several generations, and now there is an improved version of Omni-heat 3D, Omni-heat Black dot. The principle is to reflect human radiation (blackbody radiation and energy lost by body metabolism), and Black dot also tries to absorb external radiation. Many domestic manufacturers have also followed suit, which is not a new thing for a long time.