>>1635016>exact physics of heat transferAh fuck it, it's not that hard.
https://en.wikipedia.org/wiki/Thermal_insulation#Definition>heat loss P = k*A*deltaT/dWhere k is the thermal conductivity of the insulative material, A the surface area, deltaT the difference of termperature between inside and outside the insulation, and d the insulation thickness.
Lets assume a human body has a given thermal power output P. It is also supposed to retain a certain temperature differential to the outside of deltaT. For this to happen, it may be uniformly insulated according to the formula above.
Now, assume we add another layer of this insulation. (And let's assume that the surface area doesn't increase... not entirely true). The same heat loss can now sustain twice the deltaT (since deltaT is applied at every layer of insulation.) In short, twice the insulation allows for twice the temperature difference between body and surroundings, in a simplified model. And so on.
