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This 3-season backpacking bag uses efficient synthetic insulation on the bottom and high-lofting, water-resistant down on top for outstanding warmth in temperatures down to 19°F.

  • Features

    • Synthetic insulation on the ground level and water-resistant, 650-fill-power down on top deliver excellent warmth, even in damp, cold conditions
    • Body-mapped insulation yields maximum thermal efficiency by increasing insulation around the parts of the body that need it most
    • Hard-wearing outer shell has ripstop nylon on top and polyester on bottom
    • 3D hood construction provides an ergonomic fit for greater warmth
    • Full-length zipper is backed with a snagless, insulated draft tube


    Many sleeping bags are rated for temperature by an independent testing protocol. REI and the broader industry now use the International Organization for Standardization (ISO) 23537 protocol, which improves on the older European Norm (EN) 13537 standard; you may still see older items in our assortment that were only EN tested. With either protocol, each bag gets a Comfort (or T-Comfort) rating and Lower Limit (or T-Limit) rating. The Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Ratings are based on a person wearing one long underwear layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38. Many brands use the Comfort rating for women's bags and the Lower Limit rating for men's and unisex bags. Everyone's body and sleep comfort differ, and conditions of use (posture, clothing, sleeping pad R-value, wind, humidity, etc.) affect total insulation, so EN and ISO ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth.
    View all Marmot Men's Sleeping Bags
  • Technical Specs

    Best Use


    Tested Lower Limit

    19 degrees (F) - EN

    Tested Comfort


    Temperature Rating (F)

    20 degrees (F)

    Temperature Rating (C)

    -7 degrees (C)


    Top shell: 30-denier nylon ripstop; bottom shell: 70-denier polyester

    Zipper Location


    Insulation Type



    Water-Resistant Down



    650-fill down / SpiraFil synthetic


    30-denier nylon

    Sleeping Bag Shape


    Stuff Sack Size

    8.5 x 18 inches

    Stuff Sack Volume

    16.8 liters



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