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The AC-Bivy from MSR is a super lightweight waterproof, breathable bivy that provides an all-condition refuge. Minimalists can have full-on, durable protection for a mere pound!

  • Features

    • Top material uses a waterproof, breathable coating bonded to a tough yet lightweight ripstop nylon
    • Durashield™ polyurethane coating provides incredible waterproofness on the exceptionally durable nylon floor
    • Factory tape seam sealing provides absolute in waterproofness and out-of-the-store readiness
    • Envelope-style opening overlaps to provide a lightweight and simple entry; zippered mesh panel at the top end provides insect protection
    • 3D footbox provides ample room for campers with large feet, and comfort for everyone
    • Stash up to a medium-size pack in the hood area while you are inside; opening is situated to fit where your face is with the pack at the head for easy access
    • AC-Bivy fits you, your sleeping bag/pad and your pack!


    View all MSR Bivy Sacks
  • Technical Specs

    Best Use



    3 - 4-season

    Sleeping Capacity



    1 pound

    Packed Size

    4 x 8 inches

    Bivy Length

    88 inches

    Shoulder Width

    36 inches

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