The theoretical blanket you've described is effectively what a space suit is. The solution is an undergarment called the liquid cooling garment (LCG) which is made of a thin material with narrow pipes sewn into it. The pipes carry cooled water which circulate back to a heat exchanger.
eaumechant t1_j07ehm8 wrote
Reply to If you wrapped a human in a theoretical blanket that was able to insulate 100% of heat produced by the person, would that person’s body temperature eventually reach equilibrium, or would their metabolism cause them to keep getting hotter and hotter until they perish? by NonEuclideanGal
The theoretical blanket you've described is effectively what a space suit is. The solution is an undergarment called the liquid cooling garment (LCG) which is made of a thin material with narrow pipes sewn into it. The pipes carry cooled water which circulate back to a heat exchanger.