For quite a number of years now I've been entertaining and drawing up the idea of a hammock that can double as a proper bivy. I really like the versatility that a hammock can add to the backpacking setup, but so often hammocks are quite a bit heavier than a good UL setup, with a lot of added weight simply to help keep the walker warm. I also do a lot of walking above tree line here in Japan and often it is difficult to drop below to safer altitudes, so I need something that I can easily and often use on the ground.
I've been thinking of making a hammock out of a double layer of Momentum, with gathered ends and a Hennessey-like slit running lengthwise halfway down the upper layer of the Momentum. This slit would allow me to slip between the two layers of Momentum and use the hammock as a water-resistant bivy. No-see-um netting would cover the upper portion of the hammock and be split in two at the ridgeline, opening like a Boston-bag and closing by hooks attached to the ridgeline. I'll use my Gossamer Gear SpinnShelter as the canopy; it's long enough and has closed ends. I can bring it to ground and have a stormworthy shelter.
I'm just wondering if anyone has used Momentum for a hammock material and what they would think of its strength. I'm worried that the 0.9 weight material might not be strong enough, though by doubling up it should be plenty strong.