The T6Zero Emergency Shelter System from Coalcracker Bushcraft is built for the moment the weather turns and you need to be under something. At 6 ounces it packs to 7" x 5" — small enough that it lives in your pack and you forget it's there until the sky opens up.
Setup is three steps and takes under a minute: pull it from the built-in pouch, tie the integrated tie-outs to two waist-height trees, and stake the rear loops with sticks or pegs. No separate cordage, no rigging kit. The xenon fabric canopy opens to 86" x 65" — enough to sit out a storm, wait out a partner, or sleep under in a pinch. Coalcracker runs these in their own field courses.