Marmot Hydrogen Sleeping Bag: 30 Degree Down

We’ve read the reviews across the web for the Marmot Hydrogen Sleeping Bag: 30 Degree Down and summarize the results below:

Universal Ranking

PeakScore: 88 (out of 100)
User Rating: 4.6 stars 
Expert Rating: 4.1 stars

Number of Ratings Reviewed: 46

Pros & Cons

Reasons to buy:

User Reviews

  • Very warm for being lightweight.
  • The interior pocket is convenient and easy to use.
  • The zippers are reliable and sturdy.
  • Fabric is comfortable and provides ample mobility.
  • Compressible and easy to pack.
  • Durable and long-lasting over multiple seasons.

Expert Reviews

  • The shorter second-zipper is convenient for venting and allowing more room.
  • Very lightweight and easily packable.
  • The hood is well designed and easy to operate quickly.
  • Features 850-fill power down, which is high and provides ample warmth.
  • Full-length zipper allows you to easily get in and out of the bag.
  • Packs down smaller than most bags similar to this one.
  • Comfortable, warm, and packs small.
  • Cut larger in the shoulder and hip areas for extra comfort.
  • Interior-lining material feels soft and comfortable.

Reasons NOT to buy:

User Reviews

  • Some reports of dead spots in the baffles which allow cold to seep through.
  • Some reports of not being as warm as expected.

Expert Reviews

  • Slightly heavier than ultra-lightweight bags, being 3-4 ounces heavier.
  • The 30-degree rating might not be completely accurate, and might run a little colder.
  • Will not be warm enough for colder weather going into the winter months, in sub-freezing temperatures.
  • Higher weight than some of the competition.


The Marmot Hydrogen Sleeping Bag: 30 Degree Down is a warm, comfortable, and easily-packable bag that provides a comfortable sleep in above and near-freezing temperatures. This bag provides ample comfort and a easy-to-use hood that will be suitable for most campers and backpackers out in mild temps.


Note: User and expert rankings were reviewed across the web. Some expert reviews include these: 1, 2, 3, 4, 5, 6, 7, 8, 9.