As mentioned this net was made for a short hammock. So for the pics I shortened one of mine. Principle still applies and you would custom fit a sock for your hammock.
Slid over the hammock, ties on to the hammock suspension. Elastic bands create the net's ridgeline. The flap is draped off the backside in this pic. The ties are just simple lengths of netting about an inch wide x 8" long. Practical use of some scrap netting. String would work.
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Small gap at the top.
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The flap stretched over.
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The flap fully lays across the hammock.
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The elastic stretches for entry/exit. As long as I enter the near side, the flap does not drag on the ground.
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This netting is mosquito netting, and I would not call it nanoseeum. It has larger holes which may allow smaller bugs in.
Overall, it works. Needs to be sized right to fit a "typical" hammock.
3 panels of 36" wide fabric, hemmed and elastic encased within the two ridgeline hems. Then joined on the long edges. 90" ridgeline in these pics. I can stretch it more, and it does barely fit a 100" ridgeline, just snug and feared it may rip.
I like Hangnout's design better. But if you want removeable netting, heres a possible solution.