Building a shelter with natural materials isn’t always Leave No Trace. Practice these techniques in your own backyard, but only gather boughs, branches, mosses, and leaves in the backcountry if you’re in a true crisis. Even then, try to use dead or downed wood.
Survival Lab: Gimme ShelterLosing daylight and don't have a tent? Don't panic: We tested three shelter-making techniques that will help you survive the night. Plus: Three bomber bivies.