Did you sleep outside during the test? The real test occurs about 4 or 5am after you have been asleep for some time. Were you still warm then? Given the gear you listed, I am surprised it is warm down to 15 unless you are wearing very warm layers when sleeping.
Edit - just re-read your clothing and those layers do help, but again, the real test is early morning warmth. Good job so far.
Bookmarks