Ike said… “Put on damp base layer bottoms with shell pants on top. Put soaked base layer top on top of R1 top and hiked until warm and dryish, then flipped them and hiked some more. By 11 am, all clothes felt dry and warm to touch…. Slept in baselayers, shell pants, windshirt, and R1. By 3 am, I was noticeably cooler. Over my lower half where the quilt was still in the bivy, ice had formed between the two layers but loft was maintained. Over my torso, where I had pushed back the bivy to promote ventilation, baffles were damp and almost completely collapsed… Back home, quilt once thawed was very damp.”
I’m no expert, but I’m guessing that this is the point of major error. The “baselayers, shell pants, windshirt, and R1” had all been soaked at one time or another, and even though they “felt dry” they almost certainly had lots of moisture still inside them. As bearbreader said: “3. sleep with any damp clothes OUTSIDE the bag.” [BB, do you get inside a pen with bears then breed with them?] You THOUGHT you were following this rule, I think, but the fact your clothes “felt” dry might have fooled you, and this might be the key error.