REI Co-op  Flash 45 Pack - Men's

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Pack what you will for your weekend trip—the men's REI Co-op Flash 45 pack holds your load stable and steady. A contoured hipbelt and ventilated back panel let you hike cool and comfy.


  • 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
  • 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
  • Breathable mesh front pocket is great for a rain shell or other gear you may need to access quickly
  • Top lid is a removable, 5.75-liter pocket
  • Attachment loops on the front allow ice axes, tools and more to be lashed on, expanding your carrying ability while keeping the load stable
  • Quick-pull drawstring opening allows fast, easy access to pack contents
  • Hydration-compatible design
  • Contains materials that meet the bluesign® criteria
  • REI is Climate Neutral Certified; as we work to actively reduce our footprint, we measure annual carbon emissions and purchase an equivalent amount of verified carbon credits


View the REI Co-op Flash Product LineView all REI Co-op Backpacking Packs

Technical Specs

Item #148588
Best Use


Frame Type

Internal Frame


Ripstop nylon; nylon Oxford (bluesign® approved)

Frame Material


Reservoir Compatible


Number of Exterior Pockets


Hipbelt Pockets





Contains materials that meet the bluesign® criteria

From a Climate Neutral Certified brand

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