Item # os5ata50m02ag18zz-osprey-backpacks-bags

Osprey Atmos AG 50 Backpack


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Description: Osprey Atmos AG 50 Backpack

The Atmos™ AG 50 is the best-fitting, most ventilated and comfortable pack ever made for traditional backpacking trips lasting a weekend or more. The innovative AntiGravity suspension makes it feel like you''re carrying less weight and seamlessly wraps around your body, which means you''ll enjoy every mile more than ever. From easy to use stretch mesh side pockets, Stow-on-the-Go trekking pole attachment, and FlapJacket for lidless use, the Atmos™ AG 50 is still the top contender. Backed by our All Mighty Guarantee, forever.

Key Features of Osprey Atmos AG 50 Backpack
  • Main: 100D X 630D Nylon Dobby
  • Accent: 210D High Tenacity Nylon
  • Bottom: 420HD Nylon Packcloth
  • Load Range: 25-40 lbs
  • Anti-Gravity suspension - feels like you are carrying less weight than is in your pack
  • Removable floating top lid with dual zippered pockets and web attachment points
  • Integrated FlapJacket protects gear when top lid is removed
  • Stow-on-the-Go trekking pole attachment allows you to stow your poles in steep terrain or whenever you need your hands free
  • Adjustable harness and Fit-on-the-Fly hipbelt to dial in perfect fit
  • Internal hydration reservoir sleeve accommodates up to a 3L reservoir
  • Front stretch mesh pocket stores rain gear for easy access when skies darken, or wet gear after the downpour stops
  • Dual access stretch mesh side pockets for storing water bottles and other gear with InsideOut side compression straps
  • Dual upper and lower side compression straps stabilize loads and maintain a streamlined profile
  • Zippered hipbelt pockets keep snacks and smaller items close at hand
  • Lower zippered sleeping bag compartment with removable divider
  • Dual ice tool loops
  • Removable sleeping pad straps
  • Sternum strap with integrated safety whistle
Size Small Medium Large
Length(in) 30.71 32.68 34.65
Width(in) 14.96 14.96 14.96
Depth(in) 15.35 15.35 15.35
Volume 2868 in³ / 47 L 3051 in³ / 50 L 3234 in³ / 53 L
Weight 4.13 lbs 4.21 lbs 4.29 lbs

4.3 / 5.0
31 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Fantastic bagpack, but why differences in features?
I bought this backpack to find an optimum size and fit to go for overnight hikes while walking at a good speed to get a good workout. I've got the Aether 70l which is an overall great pack for multiple nights. For one night though a bit too big.
Below 40 turned out to be too minimalistic for me, so 50 seems just right and the suspention system is fantastic if you want to move fast and you become really hot.

What really is disappointing about this pack is the differences in features from 50 to 60 litres? Why would Osprey chose to do that? With a pack this size and load capacity you still have the same requirements for carrying an isolation sleeping pad when it's cold and you'd want the access to your stuff from the side zippers. I don't understand why you'd think customers using this bag with 50l have different needs than customers carrying 65l in this particular aspect.
I'm actually thinking about returning this pack just because of that.
August 24, 2016
Originally posted at
Almost good enough to buy
Disclaimer: I don't own this pack, but I did wear the 50L version loaded with 20 pounds around the REI store for a long time testing it out. It was a pretty comfortable pack and fit pretty well. I liked the amount of space, the pockets, and the flexibility it offered. I almost bought it. Why didn't I? Simply because it didn't have sleeping mat straps on the outside bottom. I have no idea why, and I found it very interesting that the 65L version, and most other Osprey packs do offer this, but for some reason they decided not to put any on the 50L version. Anyways, if that's not a big deal to you, go for it, I think you'll like the pack. For me, it was a deal-breaker, especially with 50L being on the smaller side for a long weekender type of pack where you don't want the sleeping mat taking up significant space. Please add sleeping mat straps!
August 10, 2016
Originally posted at
Wow...this is just superb to use!!!
There's always a few niggles from reviews about the bag. Minor, no pack is ever, ever going to satisfy everyone. The big thing should be, how does this pack feel after several hours in the mountains. I had a Gregory z55, never really unhappy with it, but never really was awed by it. 2 tramps ( sorry, need to stick to new Zealand vocabulary) in my beautiful country, not heavily loaded, maybe about 15kgs, and I'm just downright in love with it. The pre molded hip belt feels odd when you first put it on, but it just kind of snaps around your body and hugs you like your best buddy. As soon as I put it on, it just felt like it was molded for my body personally by some kind designer. Sometimes, i just kind of forgot I had it on. Yep, everyone has a different body shape, but for me, the design of it just means it kind of melts into your body and it's a joy to walk with. Sure, maybe you want the top flap removable, maybe the hip pocket zips are a little tight, get over it and remember why you are out in the mountains, to forget our stupid little western complaints and enjoy our wilderness. Thanks Osprey, it just makes an older body enjoy his time in the mountains a little more.
August 28, 2018
Christchurch, New Zealand
Originally posted at
Backpacked Europe
Backpacked Europe for 51 days summer of 2016. Pack was the perfect size! We flew American Airlines to and from Dublin- we were able to use our bag as our carry on - no problems or questions. Stuffed full as 51 days is a long time! Flew smaller airlines between countries in Europe- still no problems using as a carry on! Quick to pack since we used packing cubes. Due to the awesome back support it is a little funky shaped along the back- but no difficulties with it. Can't wait to start using it on weekend adventures :)
October 6, 2016
Madison, WI
Originally posted at
Great customer service!
I was improperly sized and bought a large (i'm 5'7, 30 waist and 38 chest), big mistake. I went on a week long backpacking trip on the Georgia AT and carried all my stuff very well, I didn't think the large was uncomfortable until a past thru hiker started freaking out. Turns out the bag was waaaaay to big for me and I was carrying all the weight on my shoulders (so thats why I was so slow, hmph). When I got back I wrote the company and got a response within the day saying that they were sorry that I was sized wrong (not their fault) and that if I packed the box up and shipped it back (with a comp'ed return tag), they'd send me a new one in a medium. That was back in June, just haven't had the chance to write up. Other than the great customer service, the pack was great! Good ventilation on the mesh insured I was never sweaty on my back, the way the frame is though made it a bit difficult to load when synched up. It held up great, straps were nice, the hip belts pockets could be better but eh. The water bottle holder saved me from having to take my pack off so many times because of the way it is diagonal to the pack. THE BIGGEST CON: no sleeping pad straps on the 50, but they're there on the 65, whats up with that Osprey?
The video is more or less to show you what it looks like and what went into the pack.
November 1, 2016
New Orleans
Originally posted at
Solid all-arounder in need of a few improvements
I've used one of these for a few years, as it's become one of the more popular all around packs out on the trails. The suspension is nice and really feels like it's hugging your back. I appreciate the fully padded hip belt, which hasn't been skimped down to some lightly padded webbing like on the Exos and Levity. I also really like the clean design, with minimal stitching on the outside of the pack exposed to wear.
However it's not perfect and I think a few improvements need to be made before I can recommend or would buy another.
First - the built-in 'FlapJacket' on top is super annoying. I never hike with a top lid, and dislike having to also undo (and redo) the buckles every time I need to get into the pack. It should be a fully removable option instead.
Second, I'd much prefer to save a little weight than have the sleeping bag compartment opening on the bottom of the pack. The fact that it has such a tight fitting zipper flap and no zipper pulls makes it more of a pain to get in and out of than it's worth. This is a recurring problem on other Osprey packs I own.
Lastly, zipping up the hip belt pockets is a two-handed affair. Not sure what can be done about it, they're really nice sized and useful pockets, but the zips won't shut with one tug, you have to use your other hand to reach across and hold the back of it while you zip it up.
June 8, 2018
Portland, OR
Originally posted at
Coolest and most comfortable pack ever
After reading some of the reviews on the Atmos AG 50 I felt I just had to add my comments. First, if you take your measurements and correctly adjust this pack, it will be the most comfortable pack you will ever own. It is true that there are no sleeping pad or sleeping bag loops on this pack. The sleeping bag is stowed in the lower zippered pocket of the pack. This is how the pack was designed. I stuff a military issue gore tex mms bivy cover as well as my down sleeping pad in this pocket with no problem. If you must have the lower loops then you need to buy the Atmos AG 65 that has the lower straps. The pack is more comfortable with everything in the pack not hanging on the outside. I am a hammock camper so this pack is great for all my gear including an inflatable sleeping pad folded up inside the pack. The internal hydration pocket fits my 3L Osprey Hydraulics bladder great. I use the quick connect kit that allows me to fill the bladder without having to remove it from the pack. The zipper pockets on the waistband are great for things you need to get to easily i.e. Cell phone, multi tool, etc. The two external water bottle pockets are easily accessible while hiking also.
The antigravity mesh makes this pack the coolest and most comfortable pack you will ever own.
August 9, 2016
Russellville, Ar
Originally posted at
Solid bag!
This is a great bag for anything from weekend to a week out on trail. I have used it on 4 separate 5 day hikes now and its amazing! I bough this to replace my aether 70 which was just too much pack for me. The only thing i miss about that back was the top lid acting as a lumbar pack. That was perfect for holding my water, an extra layer, and my medkit on day hikes.

The only things i wish the atmos had was the lumbar pack option (or the new aether daypack toplid) and the hip belt zippers to be revamped. My old bag had no issues with one handed use, the atmos seems to jam up most times.

Neither of these are deal breakers, but they dont allow for 5 stars.
July 15, 2018
Houghton, Michigan
Originally posted at
I love this pack !
I love this pack . I have had it almost a year and it was well worth the money. One thing that I like that many packs do not have is the ventilation on your back. it keeps you cool in the simmer.
March 6, 2016
Vancouver Canada
Originally posted at
Awesome pack. AG system is best I've ever used
As an adventure guide I tend to put gear through a range of conditions and uses. I also end up carrying more than my "fair share" of weight. The Atmos AG handled anything I stuffed in it. The AG system spread the load out incredibly well and was hands-down the most breathable harness system I've ever used. Super comfortable. Totally sold on this pack.
June 25, 2017
Originally posted at

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