"If you don't want to pay the price of down, or you just need a
synthetic fill (for allergies or wet weather), this is great bag. MEC
rates it at -7 C, but their ratings are very conservative. In the
mountains it definitely went below freezing at night (even in the
summer), but I was toasty-warm all night. It is a very roomy
mummy shape, quite comfortable. The only slight problem with it
was that it takes a lot of effort to stuff into its stuffsack. One
warning: any good, sufficiently warm sleeping bag will tend to
delay your getting up on a cold morning."