One other thing I read about the EN testing that you need to be aware of. They gave it as much as 48-hours to loft and even allowed the manufacturers to do things like toss the bags in a dryer (no heat of course) to ensure full loft to get those test ratings. Now I'm not sure about you guys and gals but I don't carry a dryer in my backpack. Just keep in mind you really need to pull it out early at the camp site, shake it up, get the loft going and if possible even hang it in a light breeze so the wind will help move it around a bit. The more loft = the warmer in most cases.