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.
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.
One more item you could acquire is a sleeping bag liner. These offer extra heat on cold evenings, as well as can likewise be gotten rid of and washed, conserving your sleeping bag from the regular damage.