I just briefly tested my new Grizzly sleeping bag. Rated at -50F.
I used only the bag in my blackbird - no tarp - blackbird net thrown back.
I was wearing:
Wolverine wool socks
running pants
hanes undershirt
Starter jacket
www.weather.com said the temperature is 26 degrees with 12 mph winds.
No cold spots under me at all - my face was cold and that was it. I'm going to try an extended test - hopefully tomorrow night.
Bookmarks