User Review: The North Face Men's Cat's Meow
Temperature Rating: 20
The North Face Cat's Meow has been one of the standard bags amongst the three-season sort for quite some time. It has been periodically updated, with alterations in things like zipper lining, draft tube, modifications to shell material, and so forth, but throughout it has remained a solid do-to sleeping bag for three-season use.
Rated at 20 deg, it's certainly not (in my experience) suitable for use below that mark, unless in concert with a significant liner, extra clothing, etc. I've used it in temps ranging from low 20s (I chilly, esp. feet) to fifties-plus (left unzipped to allow me to stay comfortable).
I've used two versions of the bag, and both have withstood lots of use without difficulty. It packs small, using the provided stuffsack, and maintains loft well. With care, it should provide many seasons of use.
As temps dip, it is imperative to have an insulated sleeping pad under the bag, or it will allow you o get cold in dependent areas. Without a pad, it's simply not suitable for temps below freezing, in my opinion.
All in all, though, a very good performer for most weather.