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REI Flash 18 Pack

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With the REI Flash 18 pack, versatility is the name of the game. For use in your larger backpack or duffel, this lightweight daypack cleverly converts into a stuff sack when you turn it inside out!

  • Turn inside out and it's a stuff sack to help organize your gear; once at basecamp, reverse it and use it as a daypack for short hikes away from camp
  • Removable back panel pad doubles as a sit pad; removable hipbelt and sternum strap make the pack customizable for different uses
  • Interior zippered pocket secures keys and other small items
  • Hydration-compatible design has a hose exit port and an internal sleeve to hold a hydration reservoir, sold separately
  • Top-loading entry features an efficient, single drawcord that cinches skirt closed with a single tug; a small flap covers the opening when cinched closed
  • Front of pack features twin daisy chains running vertically and a tool loop at the bottom for attaching items on the front of the pack
  • 140-denier ripstop nylon increases durability without adding weight; polyurethane coating offers weather resistance


Item 827110

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REI Flash 18 Pack Specs
Best use
18 liters
1,100 cubic inches
11 ounces
0.31 kilograms
17 - 19 inches
26 - 42 inches
Ripstop nylon
1 + main compartment
18 x 9.5 x 8 inches
Frame type
Gear capacity (L)
Gear capacity (cu. in.)
Weight - metric
Adjustable torso
Fits torso
Fits waist/hips
Suspended mesh back panel
Pack loading
Pack access
Number of exterior pockets
Sleeping bag compartment
Raincover included

REI Flash 18 Pack

Loading Ratings & Reviews...

REI Flash 18 Packis rated4.5069out of5by144.
Rated4out of5byfromNice lightweight packUsed it as a small plane carry-on and then as a daypack at my destination. Very lightweight and holds a decent amount of stuff.
Date published: 2014-01-30
Rated5out of5byfromVery good product for daily activities.Used for daily activities while traveling overseas.
Date published: 2014-01-29
Rated4out of5byfromGreat little packBought this Flash 18 a week or so before Christmas and love it. Got it on sale for under $25 makes it even better. Friend of mine had one and always thought it was a great little pack. Currently using it for my winter survival kit in my car; holds a extra pair of gloves, hat, hand warmers, and my little camp stove/fuel for heat. Works great cause its all in one spot and can easily take it in and out of the car. Looking forward to using on hiking and biking excursions this spring and summer, may even try a few hikes here this winter if time permits. Again, great little bag for what i paid for it.
Date published: 2014-01-10
Rated5out of5byfromGreat grab and go pack!Anytime I'm heading out for 3-5 miles or less, I'll grab this pack. Even for my winter dayhikes, this pack easily holds an extra layer, a hard shell, a neck gaitor, gloves, and it still has space for peeling a layer or two off if needed. The only drawback is the lack of an exterior pocket for a water bottle - I didn't care for using a bladder in this pack, but I that's why I also have the Flash 22. I use a Therm-a-Rest Z-seat in the spot where a hydration bladder would go and that has become a great way to give the pack a little rigidity using something that I always carry on the trail anyway. If I'm heading out for a longer dayhike (5-15 miles), I'll grab the Flash 22 because of the exterior water bottle holders and lid pocket (missing from the Flash 18), but overall it's a great 3-5 mile daypack that is plenty durable.
Date published: 2014-01-03
Rated2out of5byfromFabric is too fragileAlthough lightweight equipment will usually be weaker and less durable, the Flash 18 is too weak. I put a small (13-inch) laptop along with clothes and other travel paraphernalia into the pack, and the side of the laptop ripped a small tear in the side of the pack. That has not happened with any other pack that I own. The lack of a lid lets rain fall into the pack. I don't abuse my equipment, most of my stuff lasts for years. This pack requires too much babying.
Date published: 2014-01-01
Rated4out of5byfromwonderfulGood for short hiking
Date published: 2013-12-13
Rated5out of5byfromActive parents!I bought this bag to schlep around Disneyworld and it was awesome. Durable, holds a ton, lightweight, doesn't mind getting wet. I never do reviews but I was THAT impressed.
Date published: 2013-12-13
Rated5out of5byfromAll around great pack for day tripsThis is a great pack for everyday use and day hikes. The straps are very light and breathable. The pack itself seems very sturdy and should hold up well. There is a small zipper to keep small valuables in since the top is a pull tie. Seems like a great little pack. I have used it many times going through heavy brush and wading through lakes with no problems so far. My favorite features are: extremely light weight, doubles as a stuff sack, and has a pull out sit pad.
Date published: 2013-12-12

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