Similar with calfskin welding gloves. They'll protect you, but if you grab something really hot, after a moment you end up with a really hot piece of calfskin a

Similar with calfskin welding gloves. They'll protect you, but if you grab something really hot, after a moment you end up with a really hot piece of calfskin against your skin. And when you let go of the hot metal object, you still have the hot calfskin against your skin.