Marmot NanoWave 55 Sleeping Bag

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Stuff this super-packable sleeping bag into your kayak hatch or bike pannier. It's a master space-saver and has synthetic SpiraFil high-loft insulation that stays warm even when damp.

  • Features

    • Polyester taffeta fabric is treated with a durable water repellent finish that sheds moisture
    • SpiraFil high-loft insulation with blanket construction provides loft, warmth and compressibility
    • Snagless draft tube along the full length of zipper; 2-way zipper sliders
    • Feely drawcords make top opening adjustments easy
    • 2 hang loops for storing bag
    • Compression stuff sack included


    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

    54 degrees (F) - EN

    Tested Comfort

    60 degrees (F) - EN

    Temperature Rating (F)

    55 degrees (F)

    Temperature Rating (C)

    13 degrees (C)



    Zipper Location


    Insulation Type



    SpiraFil synthetic fibers



    Sleeping Bag Shape


    Stuff Sack Size

    5.5 x 10 inches

    Stuff Sack Volume

    3.9 liters



  • Reviews
    31 reviews with an average rating of 4.6 out of 5 stars

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