Marmot Lithium Sleeping Bag: 0 Degree Down

We’ve read the reviews across the web for the Marmot Lithium Sleeping Bag: 0 Degree Down and summarize the results below:

Universal Ranking

PeakScore: 92 (out of 100)
User Rating: 4.6 stars 
Expert Rating: 4.6 stars

Number of Ratings Reviewed: 66

Pros & Cons

Reasons to buy:

User Reviews

  • Compresses small enough to fit into the sleeping bag compartment on most backpacking-bags.
  • Very warm due to the high-loft down.
  • Lightweight for a 0-degree bag.
  • Durable and long-lasting.
  • Comfortable hood to keep the heat in.
  • Easy to unzip and get a leg outside if needed to regulate temperature.

Expert Reviews

  • 800-fill down provides ample warmth.
  • The down is water-resistant for extra protection and warmth in wet weather.
  • The curved baffles limit the shifting and spread the heat out evenly.
  • The contoured footbox provides more movement and comfort.
  • The secondary zipper allows you to get in and out easier.
  • The full-length zipper provides convenience and doesn’t catch during use.
  • The two-way zipper features a draft tube to keep the cold air out.
  • The down is DWR-treated to protect against light precipitation.
  • The face closure is Velcro-free to prevent scratching.
  • Great warmth-to-weight ratio for lightweight warmth.

Reasons NOT to buy:

User Reviews

  • Some reports of poor quality control and faulty products.
  • Doesn’t pack down extremely small, despite being small enough to fit in most sleeping-bag compartments.

Expert Reviews

  • The fit might be a little big in some areas for smaller people.
  • Can be challenging to stuff into sack since it has so much loft.


The Marmot Lithium Sleeping Bag: 0 Degree Down is an extremely warm, comfortable, and lightweight bag with features like a two-way zip, draft tube, and durable outer layer. This is a beloved bag that works well in a variety of backpacking conditions. Despite some minor issues, this bag is a great choice for cold weather backpacking and can compress relatively well.


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