How to Choose Daypacks

Lean, clean and well appointed, the REI Co-op Flash 22 pack is the perfect size for day hikes and done-in-a-day summits. It features a removable sit pad for enjoying those well-earned vistas.
Imported.
View the REI Co-op Flash Product LineView all REI Co-op DaypacksBest Use | Hiking |
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Bag Style | Backpack |
Frame Type | Frameless |
Ultralight | Yes |
Gear Capacity (L) | 22 liters |
Gear Capacity (cu. in.) | 1,343 cubic inches |
Weight | 14 ounces |
Fits Torso Length (in.) | 16-21 inches |
Fits Waist/Hips | 26-42 inches |
Material(s) | 70-denier recycled ripstop nylon with polyurethane coating (bluesign approved) |
Pack Access | Top |
Number of Exterior Pockets | 4 + main compartment |
Hipbelt | Yes |
Raincover Included | No |
Reservoir Compatible | Yes |
Dimensions | 19 x 11 x 8 inches |
Gender | Unisex |
Sustainability | Product meets the bluesign® criteria Contains recycled materials From a Climate Label Certified brand |
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.
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I purchased an older model of these a few years back because the price was insane and I needed something a skosh bigger for winter than the flash 18's I own which have not held up either. I truly love the features, fit and of course weight of this pack, but it simply has not held up. It's tearing along the top zipper, it has already torn on the back panel and the nylon is very worn in spots. What sort of use has it seen? Id say heavy but not daily, bottom line if i'm hiking or skiing i'm wearing this. But thats not every day, some times I bike and sometimes i'm kayaking or other activities, you get the idea. Here is the truth that i'm coming to learn, light weight sometimes means light use or simply not durable. I switched to the Flash packs from my old REI Half Dome day pack which is still in solid shape and holding up fine no tears, no holes because of weight. But in the end there is sometimes a trade off, you may go through four of these or buy a pack made of more durable material not to mention the environmental impact of chucking a petroleum based product and its affect on the climate which if you shop at REI, you probably care about.
My advice, buy it now. I've had many of these over the years. This version is by far the best in a long time. These Flash bags get better with time, the folks at REI really listen to feedback it seems. This is perfect for packing in your larger bags on trips as it takes up almost no space. That said it really does hold a lot and carrys well for the size. I beat the heck outta these lil guys, but they clean up easy, will fit under the airplane seat and is even small enough for most budget airlines. The hip belt tucks away nicely when not needed and is not just a piece of webbing anymore. Probably the best bang for you buck as far as day pack features go and you can't beat that REI customer service if you were to have any issues. Oh and I love this color option.
I purchased this bag to use as a summit pack on a backpacking trip. It has so many desirable traits for that use that I was excited to find it. It's got all the right pockets, a sleeve for a hydration bladder, attachment points for a helmet and comfortable straps. Where the bag fails is in the very thin material. The bottom is reinforced but the rest of the bag is very thin. Any time the bag bumped against rock when I was scrambling it made holes including one that is about an inch long in the very center of the back side. I'll patch it up and keep using it while it lasts but it's not as durable as I need.
I used my red Flash 22 daily for 3 years and decided to donate it and upgrade. I purchased the deep blue color and quickly discovered it is not colorfast. It bled all over my shirts, skorts, and shirts. Nothing will remove these stains. I am SO disappointed! I loved the pack but returned it. I have another new Flash 22 in black with colorful threads in the fabric. I'll test it wearing these already ruined pieces of clothing.
Love it. Especially love the light weight. Used my black Flash 22 for two weeks trekking in September in all kinds of weather and on all kinds of terrain with poles and other stuff attached to the outside. Worked great. Left the pad at home, to more easily stick it in my carry-on. When hiking, replaced the pad with an extra piece of clothing. The smallest size of the REI Duck's Back pack-cover worked well, too.
I had the previous version of this pack and loved it, so I replaced it with the new version. Still the same fundamentally-good design, with one exception: the side pockets. The previous version's mesh side pockets could each hold a Nalgene and a Smartwater if asked to. The current design will only take one bottle each.
I packed too much in my 45L backpack when I walked the 500 miles on the Camino de Santiago in '23. I developed patella tendinitis. In '25 I walked the Via Francigena (400 miles of it) and wanted to do things differently, so took this small pack. I saved 1.5-2lbs of weight by using this pack since it weighs next to nothing. It was a gamble: "how will I fit all that I need for my 5 week trip?" I thought. Here's how: -Because the water bottle pockets are slim I bought a disposable bottle - like Smart Water - and also took a mini Nalgene. A regular Nalgene can wiggle in there, but I knew I didn't want to waste that interior space by shoving a wide Nalgene in the pocket. The solution was a slim liter bottle. - Since the Flash 22 pack doesn't have a hip pouch I bought REI's "Packmod Hipbelt Pocket" for easy access items while hiking (phone, chapstick, ect.). I also bought REI's "Packmod Mesh Pocket" to store all my toiletries which I could strap to the outside of pack if I needed more interior space (like when I carried lunch stuff or packed my boots and wore my sandals). These are very handy accessories which I highly recommend adding. - I packed light: if you've done a camino before you know that you need less than what you think you need! I packed 1 lightweight wool dress, 1 pants, 1 shorts, 1 long sleeve button down, 1 tank top, 2 wool socks, 2 wool undies, 1 wool bra (just air it out at night: wool is amazing!), a shawl/scarf to cover up in church, my Smart Wool base layer, a puffy jacket, and a disposable rain poncho instead of my bulky and heavy rain jacket. That's it. I usually saved my shorts to sleep in (you really don't need a pair of pjs!) Rotate and wash, buy there if you need another shirt. - I also took "Merrell Women's Sandspur Sandals" because they are lighter and more compact than my Chacos. They are more stylish (brown leather version) and very comfortable. - I bought the Caccoon sleeping liner from REI which packs small (100% silk because bedbugs can't get in - I had an awful experience with them on the Camino and wasn't going to risk it on the Via). - I took cheap foam pedicure sandals as my shower sandals which I got off of Amazon. - I didn't bring my chunky EU charging adapter. Instead I got the tiny, cheap looking adapter that my normal small Apple charging block plugged into. I think together these weighed 5 oz. I couldn't find another one that was USB that was going to be smaller than these together. - The Sea to Summit Airlite Towel Size Small (16 x 32 in.) packs SO small and was enough to dry off, even with hair below the shoulder length. The towel was sopping wet after but dried very quickly! It did its job perfectly. - I even had room for my knee brace, 2 bottles of vitamins, and my Tri-Braided Cord Clothes Line from Amazon. - This pack also has a bungee loop and a loop at the bottom which I used to strap my poles to my pack when I didn't need them. Using this pack will force you to only pack what you need. My sister also got this pack and the REI accessories for the same trip and was very satisfied. We both know you can make do with what can fit in this 22L pack. I wasn't certain it could fit everything so I took ALL my camino gear into the store and tried packing it into the Flash 22L. It fit with room to spare! For reference, we went on the Via Francigena in July so it was hot and only rained 2 days. But again, if you need a sleeping bag and a rain jacket, first try packing it in this Flash 22L at the store before automatically upgrading to a larger bag. One last note: this bag has a foam pad against the back which doesn't offer much back support. I didn't really care about that. I simply packed my soft squishy clothes towards my back to add cushion. You can watch videos on how to back a backpack correctly to your advantage, adding comfort and condensing items. Trust me, it's a skill you need to learn! Our backpacks held up for the 5 weeks we were in Italy, showing no signs of wear or strain on the seems. On the plane back I was able to fit all my belongings as well as my souvenirs with the help of a canvas bag as my "personal item". I hope this lengthy review helps you if you are on the fence about this pack. Buen Camino!
Sigh - it makes me really sad to write this. I’ve had the previous version of the flash 22 since 2019, and it was an incredible pack. It finally started to wear out after nearly 6 years of constant use, so I bought this to replace it. The redesign that happened a few years ago came with some very measurable losses. 1) side stretch mesh pockets were replaced with inflexible nylon. Now it hurts my hand to place items in the pockets, which also hold less in general. I’m not sure what prompted this choice - it’s the most egregious change in my book 2) the front flat zipper pocket was sacrificed for unclear reasons. The side zip pocket added does not replace it by shape or capacity, as any use of that pocket decreases the capacity of the main bag compartment. 3) the lid pocket is smaller. 4) overall the bag seems to hold less stuff. Improvements include the wide hip straps and numerous lash-points for clipping on gear. The yellow color is fun. I believe the 2 buckle lid vs the 1 buckle lid of the previous version was also intended to add more external gear attachment options. That being said, I wanted a bag that focused on what I could put in it, not on it. For those who never had the previous version, this is probably a decent bag. But for me it is just a bummer.
The pack arrived with a lot of loose threads and felt pretty flimsy but given the REI reputation I figured I'd be safe. Unfortunately after four months with very light and infrequent use the strap you would use to hang it on a hook completely came off at one seam. That's especially odd since I never hung it anywhere or even used that to hold the pack very often. The base of the strap on of the shoulder straps is now coming off as well. (Photos included.) My main issue here is that I reached out to customer service and have no recourse. Buyer beware, there is apparently no warranty beyond a 90 day return window for non-members. I figured REI would have a warranty against the bag falling apart after a few months so lesson learned, make sure you check the backup on this kind of item.
I've used mine for a few years now, and it's managed to do it all: carry several days worth of clothes for a weekend trip out of town, hold everything I need for an all-day hike in the Rocky Mountains, keep my gear dry on a beach in Hawaii. I get as much use out of it on a long car trip as I do on a multi-day camping trip. It's comfortable, sturdy, and can hold far more than you can think. I love it so much I bought another one for my fiance! Notably, the fit is excellent. When I cinch the waist strap over my hips, most of the weight is lifted off of my shoulders. I've loaded this thing DOWN and not felt like I was carrying too much weight.