If it takes an ounce of 800 fill down to fill 800 cu in, does Montbell measure their loft (to get bag rating) in the streched, relaxed, or intermediate condition. If they measure the loft to get their rating when the bag is in the relaxed position, then it seems to me that if the bag were to be strected there would be more area and the loft would decrease.
How does this work?
I had a 'Stretchy Legs' bag that mountain hardware made- and one that Sierra Designs made, so I familiar with how the bags work. Just wondering how Montbell figures their loft. I am looking at a 30 degree bag and my search shows that owners are happy with theirs. I plan to use this below 30 degrees and compensate with clothing.