I can suggest not purchasing the Cat's Meow from NorthFace. On at least three occassions the bag has left me cold and shivering. The bag is rated 20f and each time the temps were above the rating by 10 degrees easily.
Either you sleep very cold, or you left the bag stuffed in a stuff sack for a prolonged period and destroyed your bags' loft. If that is the case, you deserve to freeze.
That or they just don't make 'em like they used to. The NF Cat's Meow was the first (and one of the few) to have actually been tested and certified on the Hatick Lab's "brass man".
