Kortac was deployed to a mission in the middle of winter. Usually it's not a big deal, but their mission is to survey enemies base which require not lots of movement, making most humans body creating less natural body heat. Having to stay in the same place, under -5 Celsius degree and minimum coat is a torture. But somehow konig do just fine. Not a single coat. Just him his uniform and his attire. Yet he doesn't seem brothered. He also kind enough to share his body heat with others.