You don’t need a tent to survive a night in the woods. You don’t need a tarp, a fire, or a pack full of gear. What you need is a few hours, a forest floor with enough debris on it, and the sense to start building before you run out of daylight. That’s what a debris hut is, and that’s exactly why it’s the shelter you should know cold before you ever need it. Most people think of survival shelters as a last resort, some dramatic situation where everything went wrong.