REI Co-op Flash 55 Pack - Men's

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Loaded for a week or stripped down for an overnighter, the men's REI Co-op Flash 55 pack keeps your load stable and steady. Seamlessly integrated suspension makes your hike cool and comfortable.

  • Features

    • For a tight load and good balance, Packmod compression straps (included) can be run from any loop to any other loop, so you can sculpt your pack to the shape of your load
    • Packmod pockets on the shoulder straps and hipbelt are great for camera, snacks, etc.—or you can take them off altogether to reduce weight
    • Roll-top closure lets you snug the pack down to fit the size of your load
    • Seam-taped Rainshield lining in the top lid and shoulder-strap pocket protects your gear against drizzly weather (these pockets will not withstand submersion)
    • 3D contoured hipbelt and ventilated back panel are comfortable all day with a load of 15-30 lbs.
    • Water bottle pockets are positioned forward on the hipbelt so you don't have to remove the pack to grab your drink; snap closures keep a good grip on slim water bottles
    • Exterior side pockets are great for storing light items that you want to keep handy
    • Top lid is a removable, 5.75-liter pocket
    • Breathable mesh front pocket is great for a rain shell or other gear you may need to access quickly
    • Attachment loops on the front allow ice axes, tools and more to be lashed on, expanding your carrying ability while keeping the load stable
    • Hydration-compatible design
    • Removing all Packmod accessories saves 7 oz.


    View the REI Co-op Flash Product Line View all REI Co-op Backpacking Packs
  • Technical Specs

    Best Use


    Frame Type

    Internal Frame

    Gear Capacity (L)

    S: 53 liters

    M: 55 liters

    L: 57 liters

    Gear Capacity (cu. in.)

    S: 3,234 cubic inches

    M: 3,356 cubic inches

    L: 3,478 cubic inches


    S: 2 lbs. 9 oz.

    M: 2 lbs. 10 oz.

    L: 2 lbs. 11 oz.

    Fits Torso Length (in.)

    S: 18 inches

    M: 19 inches

    L: 20 inches

    Fits Waist/Hips

    S: 30-40 inches

    M: 32-42 inches

    L: 34-46 inches


    100-denier ripstop nylon main body; 420-denier nylon bottom

    Frame Material


    Reservoir Compatible


    Number of Exterior Pockets


    Hipbelt Pockets



    S: 14 x 29 x 12 inches

    M: 14 x 30 x 12 inches

    L: 14 x 31 x 12 inches




    Contains materials that meet the bluesign® criteria

  • Reviews
    144 reviews with an average rating of 4.5 out of 5 stars

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