Just a quick question about the HH UC that is used in the HH Supershelter. I have read an endless number of posts on UQ and UC and bottom insulation and most seem to indicate that the UC or the Weather protection cover should not only be water/wind proof but also should be breathable so that moisture can make its way out of your bottom insulation and not condense within the bottom insulation (ala JRB Weathershield like).

The HH Supershelter system uses a SIL nylon undercover on the bottom that while being water/wind proof is definitely not breathable, in essence acting like a vapour barrier (VB). With the HH UC not being breathable how does this insulation system then work with regards to moisture in the insulation material above the UC and below the hammock ?

The HH SS does make use of a mylar reflective sheet (which in itself acts like as VB). Is it acceptable to use a bottom insulation system that in essence "sandwiches" the insulating material between 2 VB's as opposed to a system that is totally breathable or a system that only uses a VB above the insulation as would occur when using a UQ and a CCF pad where the CCF pad becomes the VB?

Thanks for all your thoughts.