REI Co-op Magma Sleeping Bag

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A premium backpacking bag for cold, wet conditions, the REI Magma Sleeping Bag features REI's double-protection design, which uses both water-repellent down and waterproof/breathable fabric panels.

  • Features

    • With a European Norm (EN) lower-limit rating of 10°F, this bag is suitable for 3-season use and some winter outings
    • REI double-protection design combines a polymer-coated down fill with waterproof/breathable fabric at the hood, sides and foot, the areas most likely to touch a damp tent wall
    • Water-repellent 700-fill-power duck down offers superior loft and warmth
    • Ripstop nylon shell also features a durable water repellent finish to further protect the down fill
    • Performance fit keeps weight low and thermal efficiency high
    • REI in-the-round design puts vertical baffles in side walls to wrap you in warmth and create a better fit than bags that use only horizontal baffles
    • Contoured hood, draft collar and full-length draft tube all work to keep warmth in
    • Differentiated hood and neck drawcords simplify adjustments; antisnag zipper works smoothly
    • Bag zips on the right-hand side
    • The REI Magma Sleeping Bag includes a nylon stuff sack and a large cotton storage bag
    • European Norm (EN) is an independent third-party temperature rating, allowing accurate comparisons across brands with other EN-rated bags

    Imported.

    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 REI Co-op Men's Sleeping Bags
  • Technical Specs

    Best Use

    Backpacking

    Tested Lower Limit

    10 degrees (F) - EN

    Tested Comfort

    22 degrees (F) - EN

    Temperature Rating (F)

    10 degrees (F)

    Temperature Rating (C)

    -13 degrees (C)

    Shell

    Ripstop nylon

    Zipper Location

    Left

    Insulation Type

    Down

    Water-Resistant Down

    Yes

    Fill

    700-fill duck down

    Lining

    Mini-ripstop nylon

    Sleeping Bag Shape

    Mummy

    Stuff Sack Size

    Unavailable inches

    Stuff Sack Volume

    15 liters

    Gender

    Unisex

  • Reviews
    6 reviews with an average rating of 4.0 out of 5 stars

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