Those bags look really warm...but heavy.

I laughed when I saw that the 'ultralight' weighs 3 lbs. I couldn't imagine carrying around their FTRSS system. 3 bags and the over bag alone weighs more than my one sleeping bag. Could weigh as much as 17 lbs for that system depending on how it's configured!

I do like the fact that they will ship them vacuum packed...great idea.