It pitches into shape via four corner stake points and a series of upper guy-out points that secure to hiking poles, a separately pitched tarp (sold separately) or surrounding trees. The Bug Bivy ...

Low chance of rain or snow? You might get away with a DWR treatment on the face fabric, but it’s not a bad idea to pack an additional tarp. Desert trip? A bug bivy with mesh walls might be all ...

Bring along a small to medium size tarp to use with it, like a fly, when it rains. Hammocks are the final consideration. A good quality expedition hammock is essentially a hanging bivy.

Low chance of rain or snow? You might get away with a DWR treatment on the face fabric, but it’s not a bad idea to pack an additional tarp. Desert trip? A bug bivy with mesh walls might be all ...

It's a four-ply waterproof, heat-reflecting tarp with grommets in the corners that allow you to rig it in any number of ways. Another strong choice is Adventure Medical Kit's Thermolite Bivy Sack ...