When your out there, too far for the city to reach, everywhere is dangerous. All hunters have to learn this. Every hunter has a story to tell about someone they lost to the dark beyond. The guardian they couldn't revive, the body they had to leave behind. Out there, you can only trust yourself and your fireteam. No help comes. You learn or you die. Every hunter knows that they could be leaving the tower for the last time. They have a friend or mentor who has done just that. Every hunter comes home alone at least once. But still life must go on. The darkness must be pushed back. So they do the only thing they can. Somewhere on a hunters armor there is always a mark. Left untouched by shaders as a memory. A memory of those in the howling dark who will never see the light. And that is why hunters have that one piece of armor. (A bit of lore for the community)