Danielwrote a review of Western Mountaineering Puma Gore WS Sleeping Bag: -25F Down on January 22, 2017
So far, I've used this bag on summits of Rainier, Eldorado Peak in the North Cascades and 5 nights in Yosemite backcountry. It was easily warm enough for sleeping on the glacier and still very comfortable in higher temps. I just kept the side zips open and it was perfect. I used a sleeping pad and ZLite air mattress underneath and it regulated temps well. I keep the bag in a waterproof compression sack when in my pack and it always comes out great. No problem with moisture. Other reviewers are right - construction and materials are top notch. I highly recommend this bag.