Marmot Helium Sleeping Bag: 15 Degree Down

We’ve read the reviews across the web for the Marmot Helium Sleeping Bag: 15 Degree Down and summarize the results below:

Universal Ranking

PeakScore: 92 (out of 100)
User Rating: 4.8 stars 
Expert Rating: 4.1 stars

Number of Ratings Reviewed: 82

Pros & Cons

Reasons to buy:

User Reviews

  • Comfortable fit.
  • The second zipper allows for convenience, and lets you use the sleeping bag more like a comforter.
  • Slightly water-resistant if there is moisture inside the tent or a leak.
  • The zippers are high-quality and don’t snag the fabric.
  • Well-made and high-quality materials and construction.
  • Doesn’t feel restricting when inside.
  • The small zipper on the side allows you to put both arms outside for freedom of mobility.
  • Packs away easily and conveniently.
  • Lightweight and breathable.
  • Keeps your extremities and core warm.
  • Can be used in a variety of weather conditions.

Expert Reviews

  • A warm bag that is suitable for many seasons.
  • 800-fill down provides warmth without being too heavy.
  • DWR treated down for slight water-resistance.
  • The fabric is comprised of Pertex Microlight, which resists abrasions and scratches.
  • The curved baffles allow you to move the down to the colder areas.
  • Six-baffle hood for warmth and comfort.
  • Foot-box is anatomically constructed to promote comfort and warmth.
  • Two-way zippers for easy use.
  • Lightweight ripstop nylon is durable.

Reasons NOT to buy:

User Reviews

  • Not the lightest or warmest option.
  • Lack of a right zipper makes it less efficient.
  • Might be too roomy or wide for a small person.

Expert Reviews

  • Expensive option.
  • The wide fit may be too wide for those with narrow shoulders.
  • Lack of a neck baffle reduces warmth.
  • Slightly heavier when compared to other similar bags.


The Marmot Helium Sleeping Bag: 15 Degree Down is a solid option for backpackers and campers looking for a warm and comfortable bag. While some users find the lack of a neck baffle and heavier weight construction to be less-than-ideal, this bag is a still a solid performer.


Note: User and expert rankings were reviewed across the web, including here: 1, 2, 3.