There are primarily two types of sleeping bags. One is the mommy bag and the various other is the "traditional" rectangle-shaped resting bag. Currently mind you, ain't nothing incorrect with old school in any way. It might be your preference once you uncover just what it's like verses the mommy bag.
I could confess that I have actually had one as well lots of experiences with that and also young boy, that was enough for me recognize that if I desire to truly want to enjoy my trips, finding the perfect resting bag for me is a top priority. The trouble is that when I went to look for my "ideal bag" there was so lots of choices I didn't recognize which bag would function best for me.
If you see a +20 degree score that would certainly indicate that the bag should be cozy enough for temperatures that are 20 levels or warmer.. And if you see a - 20 level score then it has actually been figured out that the bag needs to be cozy sufficient for minus 20 degree climate.