I am a very cold, cold sleeper. I purchased the 15 degree and went on an over night antler hunt in the Mazatzal Wilderness where it got down to 20 degrees. Happy to say: I stayed very warm the entire night....including my feet! Great bag. And the zipper works great. Its a different design that the standard zipper. Its a snag free design and it really was snag free. I am 6'2", 195 lbs and I have perfect fit with the long version. I love this bag!
This review was written in the old system and had content requirements that are different than reviews written today.