Mountain Equipment Starlight I Sleeping Bag - Women's Long

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Color: Aubergine/Blaze
Size: Long - Left Zip
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A full-featured bag weighing under 2 lbs., the women's Mountain Equipment Starlight I long-length sleeping bag is ideal for summertime adventures and hut-to-hut tours.

  • Features

    • Helium™ 30-denier outer fabric is both durable and comfortable
    • POLARLOFT® synthetic insulation helps maintain warmth even while wet
    • Offset layer construction improves warmth by reducing cold spots
    • Alpine fit maximizes thermal efficiency
    • Anatomically shaped hood and foot box
    • Full-length zipper baffle and integrated collar
    • Includes a lightweight compression sack
    • The Mountain Equipment Good Night's Sleep rating for this bag is 41°F (5°C); this may tally closely to the EN/ISO rating, but for certain bags the discrepancy may be larger
    • Mountain Equipment is a member of Fair Wear Foundation, a European initiative working to improve workplace conditions in the garment and textile industry
    • Closeout


    Mountain Equipment conducts their own laboratory and cold-chamber testing to give their bags a Good Night's Sleep temperature rating–a rating they feel is the most accurate reflection of a bag's potential in real-life situations.

    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 Mountain Equipment Backpacking Sleeping Bags
  • Technical Specs

    Best Use


    Tested Lower Limit

    41 degrees (F) - EN

    Tested Comfort

    48 degrees (F) - EN

    Temperature Rating (F)

    41 degrees (F)

    Temperature Rating (C)

    5 degrees (C)


    1 lb. 15 oz.



    Zipper Location


    Insulation Type



    Polyester fibers



    Sleeping Bag Shape


    Fits Up To (in.)

    73 inches

    Shoulder Girth (in.)

    30 inches

    Hip Girth (in.)


    Stuff Sack Size

    9 x 7 x 5 inches



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

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