Marmot Lozen 30 Sleeping Bag - Women's Long

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Color: Late Night/Steel Onyx
Size: Long
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Designed for sustained cool, wet weather, the Marmot Lozen 30 women's long-length sleeping bag with water-resistant down keeps you toasty and dry whether backpacking, mountaineering or river rafting.

  • Features

    • Updated liner fabric improves comfort
    • Insulated with certified 650-fill-power goose down with Down Defender to improve water resistance in wet conditions
    • Nautilus multibaffle hood is designed to limit heat loss from your head
    • Ground-level side seams wrap around your body to maximize warmth
    • Anatomically shaped footbox allows more wiggle room and less heat buildup
    • Internal stash pocket keeps small gear accessible
    • Women-specific fit
    • EN tested
    • Stuff sack included
    • Closeout


    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 Backpacking Sleeping Bags
  • Technical Specs

    Best Use


    Tested Lower Limit

    4 degrees (F) - EN

    Tested Comfort

    17 degrees (F) - EN

    Temperature Rating (F)

    17 degrees (F)

    Temperature Rating (C)

    -8.3 degrees (C)


    3 lbs. 5.4 oz.


    Ripstop polyester

    Zipper Location


    Insulation Type


    Water-Resistant Down



    650-fill-power goose down

    Fill Weight

    1 lb. 9.6 oz.


    50-denier micro pongee

    Sleeping Bag Shape


    Fits Up To (in.)

    72 inches

    Shoulder Girth (in.)

    63 inches

    Hip Girth (in.)

    61.8 inches

    Stuff Sack Size

    9.4 x 18.9 inches

    Stuff Sack Volume

    21.7 liters



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