This is a very interesting graph from the Mammut catalog. I darkened the EN lines to make it more readable. Of particular interest to me is the maximum comfort lines, which I think are an overestimate, but seems to suggest that a 10dF/-12dC bag isn't horrable at 40dF/7dC.

Here's the publication:

Edited by jamieS (12/30/14 01:27 PM)