Danewrote a review of Marmot Helium Sleeping Bag: 15 Degree Down on March 28, 2012
This is one amazing sleeping bag. I have had this bag for a few years and it has yet to disappoint me. This bag is rated 15 degrees however I have pushed it to 0 and -17 with a bivy sack. With a compression sack this bag can get down to a small cantaloupe or musk melon. This bag will make you not want to get out of bed in the morning.