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REI Flash Sport 15 Pack

Black/Lime Spritz
Black/Lime Spritz

This product is no longer available, but don't go just yet.


  • Contoured to fit close to the body for stability, the pack's side compression straps pull the load tight to your lower back
  • The stretch-mesh shoulder harness enhances air circulation, moves with you and fits comfortably
  • Stretch pockets on shoulder straps combine with zip hipbelt pockets to keep necessities accessible
  • Floating front stash pocket is big enough for a jacket
  • Hydration-compatible design accepts most reservoirs (sold separately) up to 3 liters; pocket is accessible via an external zip for easy refills
  • The men's REI Flash Sport 15 Pack has a front clip loop that lets you attach a safety light (sold separately)


View all REI Daypacks

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Best Use Hiking, Trail running
Bag Style Backpack
Frame type Frameless
Gear capacity (L) 15 liters
Gear capacity (cu. in.) 915.4 cubic inches
Weight 1 lb. 1 oz.
Fits torso 17 - 19 inches
Fits waist/hips 16 - 42 inches
Material(s) Ripstop nylon
Suspended mesh back panel No
Pack access Top
Number of exterior pockets 8 + main compartment
Dimensions 18 x 9.5 x 7.5 inches
Gender Unisex

The REI Difference

100% satisfaction guaranteed

We stand behind everything we sell. If you are not satisfied with your REI purchase, you can return it for a replacement or refund within one year of purchase.

REI's guarantee doesn't cover ordinary wear and tear or damage caused by improper use or accidents.

If your item has a manufacturing defect in its materials or workmanship, you can return it at any time. See our limited warranty.

Gear & advice you can trust

At REI, we live and breathe the outdoors, and we're passionate about sharing our expertise with people of all skill levels. Whether you're new to the outdoors or a seasoned explorer, we'll take the time to understand your needs and help you find the right gear for you.

10% annual member refund

Anyone can shop at REI, but for a one-time $20 fee you can become an REI member and enjoy a lifetime of benefits. These include an annual member refund, typically 10% back on eligible purchases.*




*10% is typical but not guaranteed. Your refund is based on eligible purchases, which exclude REI gift cards, services, fees, REI Adventures trips,, and discounted items. Learn more