Here’s a mummy bag. This is probably the most
common backpacking bag. It’s thermally efficient, often they’re light. You can get all different
weights in this so of course the more you pay the lighter it will be, but this one you’ll
notice is tapered at the foot so there is not a lot of space to heat up before the bag
starts doing it’s job. A zipper runs along the length of it. You’ve got venting options
from the bottom. Some people if they get hot they’ll stick their feet out the bottom there.
At the other end of the bag you have a hood. The hood is nice because it’s basically weather
stripping. Imagine yourself all bundled up on a cold morning your head just peering out
of here, nothing but your face. On the inside this one even has a draft collar. It’s kind
of like a little, a little collar that just goes around your neck and keeps that heat
in. Again you’re going to have to, while you’re in here go ‘am I too hot?’, ‘and I too cold?’.
Your body will let you know and you’ll vent accordingly or bundle up. If you have any
questions give your local outfitter a holler.