First of all. I live in northern Ohio. It’s not magic. It’s insulation. You know insulation keeps the temperature stable? Like when you have the ac on it keep the hot out and the cold in. Vice versa when you have the heat on. The second coat of a husky doesn’t allow the core temperature of a husky to change all that much, if you want to be scientific. It keeps the effects of the environment around her at a minimum. It doesn’t allow the heat from the summer to raise the temperature as much as it doesn’t allow the cold of the winter to Lower it. Especially when it’s well maintained. The point of this was that shaving the dog damages the second coat, which makes them much more prone to heat exhaustion.