Good and bad news. So i took my sleeping bag out of the back of my truck and opened it up and did some specific research on the bag. Turns out that it isn't half bad. It does weigh something like 3lbs 4 oz, which isn't to bad i don't think. It has also got pretty good reviews on all the sites. Now to the bad. I have neglected it. I have been storing it bundled up in my truck for about a year now, on top of the fact that it is already 5+ years old. That REI sub kilo is such a deal. I am kind of torn between getting the sub kilo or waiting and seeing how my old bag holds up. any ideas?