These are just fantastic, I bought a second one after the first. This is a reversible, zipperless sleeping bag. The bottom layer is a little more padded which is great for when sleeping on an airbed as it gives a little more warmth. being zipperless you can use it to wrap over the top of another traditional sleeping bag to give extra warmth, or use it on it's own in warmer months.
rated at 10+ degrees it's comfy enough for most nights, with a "hood" that has a fair bit of padding to it.