REI Co-op Flash Sleeping Bag

This product is not available.

Shop similar products

This 3-season, ultralight sleeping bag uses a clever design of water-repellent down and synthetic insulations and waterproof / breathable fabric panels for double the protection.

  • Features

    • With a European Norm (EN) lower-limit rating of 29°F, this bag is suitable for 3-season use
    • REI double-protection design combines water-repellent fills with waterproof / breathable fabric at the hood, sides and footbox, the areas most likely to touch a damp tent wall
    • On top of the bag, where superior loft and warmth are key, the bag is filled with water-repellent 700-fill-power duck down
    • On the bottom is resilient Primaloft® Sport insulation, which performs well in a compressed under-bag space
    • Ripstop nylon shell also features a durable water repellent finish to further protect the bag's insulations
    • 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, insulated face muffler and full-length draft tube all work to keep warmth in
    • Differentiated hood and neck drawcords simplify adjustments; antisnag zipper works smoothly
    • Most REI backpacking bags can be zipped to other REI backpacking bags; women's bags zip on the right, unisex on the left
    • The REI Flash Sleeping Bag includes a nylon stuff sack and a large cotton storage bag


    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


    Tested Lower Limit

    29 degrees (F) - EN

    Tested Comfort

    41 degrees (F) - EN

    Temperature Rating (F)

    29 degrees (F)

    Temperature Rating (C)

    -1.7 degrees (C)




    Ripstop nylon

    Zipper Location


    Insulation Type


    Water-Resistant Down



    700-fill duck down (top) and PrimaLoft Sport (bottom)


    Nylon taffeta

    Sleeping Bag Shape


    Stuff Sack Size

    7.5 x 15 inches

    Stuff Sack Volume

    11 liters




    Down certified to the Responsible Down Standard (RDS)

  • Reviews
    53 reviews with an average rating of 4.2 out of 5 stars

    Loading Reviews...
  • Questions & Answers

    Loading Questions...