I have a stash of mosquito netting I picked up at a surplus store a while ago. This is a perfect use for it.
The netting is 6 feet wide. I took two ten foot lengths of this and sewed them together along the long edge, creating a rectangular piece that is twelve feet wide and ten feet long.
I put in tabs to hold suspension cord. Two at each end, set in two feet from the edge, offset from the center seam by 16". Attached 10' of braided mason's line to each. Put in 3 ft long oak dowel rods
that the net can hang from through the tabs, but they aren't necessary. Just means the net can hang from two attach points rather than four.
Then I sewed up the short edges. No fancy business with making a "box". This leaves a pocket of fabric kind of like the shelf in a Blackbird hammock. But simplicity was key. I ended up being able to make one of these in an hour, and had material enough for four nettings.
They are on their way to Global Embrace Missions now...