Comments about Kelty Cosmic 20F Down Bag for Women:

I used The Kelty Down 20 during my backpacking trip in Alaska during summer. The night temperature was around 30-40 degrees.
1) The bag is comfortable
2) and warm, it retains heat very well especially with all the draw cords tightened.
3) The bag feels roomy enough that i can still move around a little, to turn side ways etc. I didn't feel restrained at all (I"m 5 ft, weigh 95 pounds).
4) The zipper doesn't snag easily which is great.
5) Hood drawcord comes in two different color which was great to help me differentiate which one to pull to maximize comfort.

Some minor drawback:
1) the sack is a little small and it's not a compression sack - which means it takes some time to fit the bag back into the sack. Alternatively you can get a bigger compression sack for easier packing.
2) No pockets in the bag.