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Boasting lightweight construction, a fitted silhouette and premium, water-resistant 850-fill-power goose down, the REI Co-op men's Magma 10 sleeping bag delivers an excellent warmth-to-weight ratio.

  • Features

    • Designed with generous knee and foot space and a fitted silhouette that delivers the most efficient warmth-to-weight ratio in the REI Co-op brand sleeping bag line
    • Downproof Pertex® shell, water-resistant 850-fill-power goose down and supple 15-denier lining combine to provide lasting coziness and a super-soft feel
    • Trapezoidal foot box keeps feet comfy; a toe box baffle positions downward to provide warmth
    • Variable baffle spacing locates and stabilizes down fill, delivering high thermal efficiency and reducing weight
    • New zipper cover and internal antisnag strip combine for easy zipping; a hybrid zipper path provides easy access along shoulders and torso
    • A contoured hood retains warmth while providing space for a low-profile pillow; two different hood drawcords allow internal adjustment to avoid heat loss
    • Insulated yoke fills neck and shoulder gap to prevent heat loss
    • Includes a stuff sack for packing and a roomy mesh sack for breathable storage
    • 2017 Editors' Choice Award winner from Backpacker Magazine

    Imported.

    Many sleeping bags are rated for temperature by an independent testing protocol. With both European Norm (EN) 13537 and International Organization for Standardization (ISO) 23537 testing, each bag gets a Comfort (or T-Comfort) rating and Lower (or T-Limit) rating. The Comfort/T-Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower/T-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 hat, sleeping on a single 1 in. thick insulating pad. Many brands use the Comfort rating for women's bags and the Lower rating for men's and unisex bags. Everyone's body and sleep comfort differ, so EN and ISO ratings are simply a guideline to help you compare products.
    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)

    -12 degrees (C)

    Shell

    15-denier ripstop nylon (bluesign® approved)

    Zipper Location

    Left

    Insulation Type

    Down

    Water-Resistant Down

    Yes

    Fill

    850-fill goose down

    Lining

    15-denier ripstop nylon

    Sleeping Bag Shape

    Mummy

    Shoulder Girth (in.)

    60 inches

    Hip Girth (in.)

    57 inches

    Stuff Sack Size

    7.5 x 15 inches

    Gender

    Men's

    Sustainability

    Down certified to the Responsible Down Standard (RDS)

    Contains materials that meet the bluesign® criteria

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