Note for colder weather hammocking - I have rigged a sort of "deconstructed underquilt - by adding some sheets of wal-mart poly fill insulation from the sewing department to what I put between the tarp and the hammock bottom. I've also used a thin synthetic sleeping bag for this purpose. with both rigs I've successfully slept comfortably in my hammock down to about -15C - although realisticly if I know I'm going to be facing colder than -10 I normally go to ground and sleep on pads.