You can draw some general conclusions on a quilt's effectiveness based on loft, and this may help you compare one quilt/bag to another...but that's all. So many other factors affect the true temp someone can take a quilt to, and some of them won't even be constant for a person. Hydration level, that day's exertion level, whether you're hungry, how long it's been since you last ate complex carbs, humidity level, wind speed, dew point, price of tea in Thailand, etc.
That's why it's difficult for a manufacturer to give a solid temp rating.
“Republics are created by the virtue, public spirit, and intelligence of the citizens. They fall when the wise are banished from the public councils because they dare to be honest, and the profligate are rewarded because they flatter the people, in order to betray them.” ~Judge Joseph Story
- My site: http://www.tothewoods.net/
- Designer, Jeff's Gear Hammock / Pack Cover
IMPOSSIBLE JUST TAKES LONGER