I tried many sleeping bags with the slick polyester covers and linings. They're available in a wide range of prices, sizes, temperature ratings and they pack down much smaller and lighter. I want to like them, but...I just can't. Maybe it's because as a kid growing up in the 60s my idea of a sleeping bag was firmly set as a canvas shell with flannel lining. However, I think it's mostly that I prefer the feel of the canvas and flannel against my skin. The polyester fabric is simultaneously too cold and also too hot and sticky. Ick!
This bag is entirely lovely. It has a separate foot zipper for ventilation and a double-headed zipper at top that can be worked either from in or outside the bag. I have had a few instances of the zipper getting stuck in the lining, but that's easily fixed and it has happened to me with every sleeping bag. We were recently camping during a snowstorm and I must admit, it was necessary for me to wear my down puffer jacket over my long underwear. It's true that a 30 degree bag will keep you alive, but will not keep you comfortable at 30 degrees. :-) If I were richer, I would buy the Kodiak 0 degree bag too and bring it instead when the weather could be too cold for my 30 degree bag. The wrap around hood looks really nice. Kodiak, please let me know if it ever goes on sale!
This bag has attached cinch straps and comes with a sturdy canvas sack. You would never want to use the bag for backpacking, but for me it's awesome.