Awesome cold temp bag.
Review by: Wall-Ninja, 2011-07-13
I have the saw tooth membrain (water proofed) with is extremely warm! I used it in snow caves and at mt whitney base camp and each time temp was not a problem for me while my friend in a blue kazoo was still wearing all his clothes and I was sweating a little in just a tanktop and thermals. This is a great winter bag!