Comments about Kelty Cosmic 0F Down Sleeping Bag - Long:

I took this bag out on a Wyoming Wind River Mountains backpacking trip. The temps got down to the 30's at night and I had to sleep with the zipper open on this bag.
It's relatively lightweight and packs nicely. It's a great deal on a down bag. Most others I looked at were nearly twice as much to shave a couple of ounces.

Comments about Kelty Cosmic 0F Down Sleeping Bag - Long:

I have used this sleeping bag three times so far, twice on backpacking trips. I think it's a great value for a down sleeping bag--yes there are lighter 0 degree bags, but you will pay a lot more for them. I am 6'3" and the long bag fits well. All in all, another great Kelty product.