REI Co-op Monorail Sling Bag

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The REI Monorail Sling bag has the volume of a daypack and the features to meet all the challenges of the daily urban grind. Outdoor-inspired details make hauling the load comfortable and convenient.

  • Features

    • Shoulder sling can be attached on either side of the bag to allow use by right- and left-hand users; sling back rotates forward for easy access without removal
    • Panel opening zipper provides easy access to contents
    • Sleek and protective neoprene sleeve holds iPad® and most ebooks
    • Main compartment accommodates legal-size documents
    • Side mesh pockets with elastic closures ensure quick access to essentials
    • Zippered pockets offer organizing options, including pen slots, phone slot, mesh divider and key fob
    • Carry strap has stretch mesh pockets for quick access to small essentials
    • Exterior zippered pocket holds small items
    • Durable ballistic nylon bottom panel and foam padding protect contents


    View all REI Co-op Shoulder Bags
  • Technical Specs

    Best Use


    Bag Style

    Shoulder Bag

    Gear Capacity (L)

    19 liter

    Gear Capacity (cu. in.)

    1,159 cubic inches

    Number of Exterior Pockets

    6 + main compartment

    Laptop Compartment


    Fits Laptop Size (in.)

    15 inches






    18.5 x 12 x 7 inches


    1 lbs. 8 oz.



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