Dan Dittmar wrote a review of MontBell U.L. Super Spiral Hugger #1 Down Sleeping Bag: 15 Degree on June 27, 2011
In my view Montbell has the most innovative bag design out there. The stretch in these bags is great. I have a large athletic build and like to toss at night- this bag gives plenty of room while eliminating cold spots. I'm 6'1" and got a long- I was glad I did so. I've used it on some very wet nights in Iceland and the polkatex material did a bang up job of keeping the down and my self dry. My only complaint is the hook and loop closure on the draft collar, its hasn't been much of an issue really but there is a better solution out there I believe. It packs great in a Sea to Summit eVent bag. The tech specs speak for themselves.