Home Forums Hunting & Shooting Backpack Hunting Recommendations on a zero degree bag?

I have an REI Magma bag, 10* IIRC. This year I was trying some different things and had a Kifaru Woobie along originally for my wife to use while glassing or around camp. Along the lines of a system, we ended up with some unusually cold weather and draped the woobie over the bags and was pleasantly surprised at the difference that made. The woobie was also quite nice to have for glassing!

Edit: for reference, my wife has a Marmot Helium 15* bag and was reasonably comfortable with temps around zero. Also dressed like an Eskimo!