Sierra Designs Nitro 15 Degree Down Sleeping Bag - 800 Fill(Size: Regular )Price: $199.99 at Outdoor Outlet and free shipping by standard method.
See motorapido's post today on the 3.26 lb. winter system he developed. This is the same bag he is using to create his peapod knockoff.
This is a great price on an 800 fill 15 degree down bag.