Originally Posted by Dave10
2Q doesn't think his undercover will work with the underpad. 2Qs undercover is way cheaper then Hennessy. I might still try it out
I don't understand why they think it won't work. The HH pad is only 5/8" thick and has it's own suspension. You could use a thin plastic painter's drop cloth and get away with it-- durability aside. All you are doing is to cut off the wind and create a dead air space. The HH undercover is silnylon, so it isn't any more breathable than any piece of plastic, space blanket, PU coated nylon tarp, etc, etc. The dimensions on the 2QZQ undercover are generous enough to work with just about any hammock, IMHO.
The undercover concept isn't rocket science! The fit doesn't need to be all that fitted or exact, but getting a good seal on the sides and ends will keep cold air from migrating in. Having light shock cords in channels on the sides makes for a better seal and aids the suspension. You can alter the spacing between the pad and the undercover mostly with the end suspension adjustment and a bit more with the side shock cords. I have used the same rectangular-cut gathered-end undercover with the Hennessy Expedition Zip, the Warbonnet Traveler and a Grand Trunk Ultralight. I would expect the Hennessy SuperShelter undercover to have a more customized fit and less fiddle factor on the first try.
There are a lot of concerns with breathability and condensation on an undercover. My experience is that it isn't a big deal with undercovers. I imagine that is because warm moist air goes UP. There is enough inefficiency in the side seal to allow a little air exchange as you move around. After many nights with an undercover in high humidity, the most condensation I saw was a light vapor on a space blanket used directly under my hammock, with a small drop or two at most. My clothing and sleeping bag were never wet. A CCF foam pad doesn't breath either and you don't hear much about condensation problems with them.
I chose a waterproof undercover because I wanted to use it as a poncho. For most hammock use, a normal DWR water repellent coating should be more than enough to take care of any side splash or wind-blown rain, especially with a full-sized tarp. In other words, I don't think you need to go to the expense or weight of a completely coated waterproof fabric.