It’s a SOL Escape Bivvy under an OR Alpine bivy
The SOL Escape insulates a bit with its reflective coating and breathe very well (0.67cfm) so there is no condensation inside it (plus the fact that I breathe through the face hole also reduces the amount of moisture inside it). If there is some condensation, it is on the Alpine, but not an awful amount. This is still one of the most breathable WPB bivy on the market (next to a bivy made of Event maybe) , but still, in some conditions all bivies have a condensation problem. The condensation then flows and forms a puddle in the Alpine but that water never penetrates the Escape.
I also tried the same system with the 2GoSystems bivy (Sing UL, its like the Trifecta but cannot be opened), it works as well, but the Sing UL is bigger than the SOL Escape so I would only use it if I needed the bigger space for a loftier sleeping bag under it.
This system also allows me to chose a sleeping bag of a lesser weight. (reflective coating + air gap + kind of greenhouse effect from moisture kept inside the system)
I’m not sure if it’s better to put my sleeping pad inside my Escape (or Sing UL) or between the Escape (or Sing UL) and the Alpine for maximum insulation
