I'm looking for a light(ish) weight...breathable waterproof material that can bear 300-400lbs but also prevent moisture penetration if it's on the ground. (like a bivy).

My goal is to make a traditional mayan-style hammock with a ridgeline and a zip-up waterproof shell. That way I don't need a tarp, and my hammock can double as a waterproof bivy when I'm grounded.


Also: I'm torn between sewing it as a bivy with gathered ends and doing it all myself.

OR

just buying the Warbonnet blackbird and modifying it by adding zippers for the liner.

But a premade hammock will probably have a bit of extra hammock material I don't need so doing it myself may help me cut down on the weight. (I'm 5'6)