I just finished my wool lined hammock for traveling Sunday...
It feels like like a tent on the inside when zipped up, though the similarity ends at there being a dark floor and light walls and ceiling.
The outside is nice and plain, all windbreaker nylon. That is my tarp tucked to the side.
The brown part is the wool, the rest is light nylon.
The hammock does not take up much room in my bag, and I have taken it down to zero with my heavy clothes on for a night, before the zippers were added, I expect I can sleep in this just past zero now.