Right, like I said a poor thermal conductivity but as far as blankets go, you won’t find anyone attempting to get warm with chainmail because it would unfortunately result in an increased loss of body heat. In so far as blankets go, not an insulator.

Also worth mentioning I was trying to stay in the real of possibilities and this case stainless wire is readily available in many forms for welding, and would resist oxidation better than copper. Obviously we can just name the best conductors of heat.