REI Co-op Lyra 24 Sleeping Bag - Women's

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The REI Lyra 3-season synthetic sleeping designed specifically for women excels in damp conditions while offering excellent compressibility, warmth and value.

  • Features

    • TS-3D insulation blend is highly compressible and durable, and retains warmth even when damp
    • Designed for women: increased hip room and decreased shoulder room offer better thermal efficiency
    • Hood fits a backpacking pillow
    • Draft collar, face muffler and full draft tube keep cold air out
    • Interior pocket for stashing essentials
    • Differentiated drawcords (1 round, 1 flat) let you adjust the hood and neck easily in the dark
    • Antisnag zipper guard keeps zipper operating smoothly
    • Shingled construction with overlapping layers eliminates cold spots
    • Water- and abrasion-resistant ripstop nylon shell
    • Trapezoidal footbox mirrors body shape for thermal efficiency
    • Pad loops can be used to keep sleeping pads in place (pad not 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 REI Co-op Women's Sleeping Bags
  • Technical Specs

    Best Use


    Tested Lower Limit

    12 degrees (F) - EN

    Tested Comfort

    24 degrees (F) - EN

    Temperature Rating (F)

    25 degrees (F)

    Temperature Rating (C)

    -3.9 degrees (C)


    30-denier ripstop nylon

    Zipper Location


    Insulation Type



    Synthetic fibers


    40-denier nylon

    Sleeping Bag Shape


    Shoulder Girth (in.)

    60 inches

    Hip Girth (in.)

    50 inches

    Stuff Sack Size

    8 x 18 inches

    Stuff Sack Volume

    10 liters

    Compressed Volume

    9.4 liters



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