I'd like to know what others think. I suspect the problem with the Turducken approach is more psychological. We test one or two parts, and then assume the combination will be fine at more extreme temps. We assume that one piece worked well at 50F, another worked well at 40F, so combined they should work at ..... 20F? When in practice they might only work at 30F. Maybe because one other piece of the puzzle was not though out or tested, or maybe because the combination of 2 pieces compresses insulation or increases moisture retention and decreases performance.echo83 wrote: I've never had an opportunity to use the SOL escape bivy, (and truthfully, I kind of hope I never have to) but I'm reasonably confident based on what I've read here and my experience with the sleeping bag/woobie combination that I should be good to go.
Am I way off base in taking the Turducken approach to my sleeping gear? Or does anyone else use a similar approach?
For me, I've slept in a setup which should have been good to -10F. At 5F it sucked. It was awful. I thought I was going to freeze to death until I got some hand warmers in there. It still sucked. The problem I had was I used a sucky sleeping pad. I did not understand R values and how they mattered. I just thought a green military sleeping mat must be amazing.
I later had a similar experience at 30F with lesser gear, but it should have been good to 20F. Again, that damn sleeping pad sucked. So my own Turduckens were awful because one piece of gear sucked.
On other occasions I have wrapped up in a space blanket and GI poncho. Nothing else. While that kinda let me sleep I was SOAKED with moisture. I have had similar experiences with other gear too. Moisture barriers reduce performance unless you have enough volume for moisture to disperse into.
I have used space blankets in different ways which helped (lean too w/ fire, ground cloth, blanket over top of fluffy sleeping bag) and ways that were not useful (alone or in conjunction with elements which don't have mass or fluffyness, or with other vapor barriers).
Back to psychology: Turduckens make us assume there is redundancy and resiliency in our systems which may not exist and which will not be discovered until tested. Better to test now than in an emergency.