Outdoor Research Alpine AscentShell Bivy

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Color: Nimbus
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Ideal for alpine pursuits and extreme weather, the Outdoor Research Alpine AscentShell bivy combines the cult-classic Alpine Bivy with Helium AscentShell tech for drastically improved breathability.

  • Features

    • Helium AscentShell technology leads to less condensation and a more comfortable sleep
    • Compared to a clamshell opening, the large, step-in opening allows you to step out of your boots and straight into the bivy easily without any shimmying
    • Durable, waterproof and breathable fabric is fully seam-taped for protection from the elements
    • Fly fastener exposes the extra-large mesh screen for stargazing
    • No-see-um mesh helps keep the bugs out
    • High-volume toe end, plus extra head room to store your gear
    • Single-pole system allows for quick setup and breakdown
    • 2 stake loops; 1 guyline loop
    • Weighs: 1 lb. 2.6 oz. with pole and 1 lb. 0.8 oz. without


    View all Outdoor Research Bivy Sacks
  • Technical Specs

    Best Use



    3 - 4-season

    Sleeping Capacity



    With pole: 1 lb. 2.6 oz.; without pole: 1 lb. 0.8 oz.

    Packed Size

    3.5 x 12.25 inches

    Bivy Length

    83 inches

    Shoulder Width

    28 inches




    Contains materials that meet the bluesign® criteria

  • Reviews
    11 reviews with an average rating of 3.5 out of 5 stars

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