Ian Pickardwrote a review of Marmot Helium Sleeping Bag: 15 Degree Down - Women's on January 3, 2012
All of the reviews for the Marmot Helium bag seem to be for the men's version. I bought this bag for my wife to use in the spring and fall backpacking seasons. Some bags, big agnes rectangle bags in particular, claim to be rated to 15 degress but most fall short. This bag easily keeps my wife warm down to the low 30's upper twenties with no complaints, we have never tested it below a temperature of 25 degress. My friend bought his girlfriend a Big Agnes lulu which is also rated as a 15 degree bag but synthetic. The loft between the bags is incredibly different (so is the price). The helium lufts up 3+ inches higher with a noticably more even distrubtion of down. The fit on the regular is great for my 5 ft 3 in wife, enough extra room to bury into the bag or keep your clothes in the footbox. My only complaint is the stuff sack, it takes me about 5 minutes to get this thing packed in and I rarely get the sinch all the way closed. Maybe the down will compress further with more use and this will become easier. You get what you pay for in a sleeping bag and this is one of the best bags in the market.