Bottom line: Buy the MB UL Down Inner or not? It will save me ~8oz in my pack, but will I be warm enough in camp? I DON'T want to be cold! I think I run avg. to slightly cold. (I estimate using to about 30*F)
I'm hoping those with experience with this jacket can help with the decision.
I've looked at Richard Nisley's graph but still don't know. For example, I have the MB Alpine Light jacket and know how warm it is. A straight calculation says the down inner theoretically is 71% as warm as the alpine light (1.78/2.51).
But, is that a legitimate calculation to do, and if so, is 71% enough to keep me warm?
In camp I will be wearing a thin merino long sleeve shirt, probably a RailRiders Adventure shirt, the Down Inner, topped with Dri-Ducks jacket. When needed, I'll add a fleece balaclava.
I understand there are numerous variables involved, but still, what is your anecdotal experience - is the MB UL Down Inner warm to about 30*F (if not, what temp have you experienced comfort)?
Thanks so much for reading and helping,