REI Co-op Flash 15 Hydration Vest

Members save 20% on this item with code MEMBER23 through March 27. Terms & conditions
Color: Rockwall
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Members get an estimated $12.00 back on this item as a part of your annual .

Members get an estimated $12.00 back on this item.
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To move fast and light on the trail, keep your center of gravity tight. The REI Co-op Flash 15 hydration vest holds 1.75 L of water snug to your core while keeping you well supplied for your day hike.

  • Features

    • Adjustable waist and sternum straps dial in the fit to keep your load tight and balanced
    • Breathable, padded mesh back and mesh shoulder straps help you stay cool on the trail
    • Included 1.75 L HydraPak Elite™ SL reservoir has Plug-n-Play quick-disconnect hose and high-flow Blaster™ bite valve that self-seals after each sip
    • 4 stretch-mesh chest pockets hold quick-grab items; they're also bottle compatible for more hydration
    • Zippered chest pocket fits most cell phones; 2 internal slip pockets and a key fob keep you organized
    • Top lid with adjustable strap lets you stash more gear
    • Locator device-compatible pocket at top of shoulder
    • 4 removable Packmod bungees can be moved to any loop on the pack to keep your load tight or to attach extra gear like trekking poles
    • 2 attached tool loops on bottom of pack can be tucked away when not needed
    • Made using bluesign®-approved materials, which conserve resources and protect the health of the environment, workers and wearer (you!)


    View the REI Co-op Flash Product LineView all REI Co-op Hiking Hydration Backpacks
  • Technical Specs

    Best Use


    Gear Capacity (L)

    15 liters

    Gear Capacity (cu. in.)

    915 cubic inches

    Reservoir Compatible


    Reservoir Included


    Bottle(s) Included


    Liquid Capacity (L)

    1.75 liters

    Liquid Capacity (fl. oz.)

    50 fluid ounces

    Number of Exterior Pockets

    8 + main compartment


    S/M: 14 ounces

    L/XL: 14.5 ounces


    Ripstop nylon (bluesign® approved)

    Bite Valve Shut-off Switch


    Fits Chest

    S/M: 33-40 inches

    L/XL: 41-48 inches

    BPA Free



    16 x 10 x 8 inches




    Contains materials that meet the bluesign® criteria

  • Reviews
    21 reviews with an average rating of 4.7 out of 5 stars

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