Free 2-Day Shipping Over $50 Order by 12/20*

Detail Images

  • Osprey Packs - 3/4 Front
  • Osprey Packs - Atmos AG 50L Backpack - Cinnabar Red
  • Osprey Packs - Atmos AG 50L Backpack - Absinthe Green
  • Osprey Packs - 3/4 Front -

Current Color

  • Osprey Packs - Atmos AG 50L Backpack - Cinnabar Red
  • Osprey Packs - Atmos AG 50L Backpack - Absinthe Green

Osprey Packs Atmos AG 50L Backpack

sale from $129.98 $230.0043% Off

Free 2-Day Shipping on Orders Over $50 Order by 12/20*

Select a Size:

Select options
  • Select options
    • S
    • M
    • L

    Select a Color:

    Select options
  • Select options
    • Cinnabar Red
    • Absinthe Green

    28 Reviews


    A versatile and well-designed pack.

    From quick overnight hikes to weekend excursions into the wilderness, the Osprey Atmos AG 50L Backpack will get you where you want to be, without your back aching every inch of the way. Now featuring Osprey's Anti-Gravity suspension system, this award-winning pack is even more comfortable than before. You might be thinking an Anti-Gravity system sounds like it belongs on a spaceship rather than a backpack, but really the system is pretty simple and is composed of a single lightweight mesh panel that extends from the top of the back to the hip. This seamless design allows the panel to automatically contour to the shape of your back, while also allowing air to pass between your back and pack for a cool and comfortable fit.

    An adjustable torso length along with an adjustable hip belt allows you to further customize the pack for your hiking comfort. Fully equipped for full days on the trail, the Atmos comes standard with a removable/floating lid that doubles as day or summit hip pack. An internal hydration sleeve lets you equip the pack with the hydration system of your choice, while two stretch side pockets can be used to stash gear or water bottles. Two front panel pockets are an ideal spot to stow maps, extra layers, and snacks, and multiple gear loops on the front of the back allow you to attach your ice axe and trekking poles.

    • Comfortable gear hauler for overnight and weekend trips
    • Anti-Gravity suspension system distributes weight of pack
    • Adjustable torso length accommodates different sized torsos
    • Fit-on-the-fly hip belt for quick adjustments on the trail
    • Top access with zippered front panel access point
    • Removable and floating top lid for quick hikes from camp
    • Internal reservoir sleeve for on-the-go hydration
    • Trekking pole and ice tool gear loops secure essential tools
    • Item #OSP002K

    Tech Specs

    [main] 100D x 630D nylon dobby, [accent] 210D high-tenacity nylon, [bottom] 420HD nylon pack cloth
    [small] 47L (2868cu in), [medium] 50L (3051cu in), [large] 53L (3234cu in)
    Waist Belt
    Hydration Compatible
    Ice Axe Carry
    Trekking Pole Carry
    Rain Cover
    sold separately
    Weight Capacity
    [medium] 31 x 14 x 16in
    Claimed Weight
    [medium] 4lb 5.12oz
    Recommended Use
    backpacking, hiking & camping
    Manufacturer Warranty

    Tech Specs

    • Reviews
    • Q & A

    What do you think about this product?

    Have questions about this product?

    Trekking round the globe

    • Familiarity: I gave it as a gift but have feedback to share

    I bought this pack for my sister to use while backpacking in the US, Europe and Asia. After several months of daily use it's held up really well, can comfortably carry a heavy load, and the small fits well (5'2" - 110lbs).

    Great Pack!

    • Familiarity: I've put it through the wringer

    All of my multi day packs are Osprey packs but this is my first time buying one with their Anti-Gravity Suspension System. I must say I absolutely love it! Not only does the hip belt and mesh make the pack remarkably comfortable but it allows for lots of ventilation for when your bag starts sweating. The easily removable lid or pack

    Great Pack!


      I did bokus of research looking for a top shelf backpack and this is the one for me. It is perfect for both minimalist and bulkers. This pack has literally everything you need from a high quality suspension, to a bladder pouch, to a built in fanny pack for when you don’t want to take your bag all the way off.

      Great pack

      • Familiarity: I've put it through the wringer

      This pack is truly fantastic. It fits comfortably, every inch of the flexible mesh hugs all the contours and curves of your back and hips. It features a complex yet easy-to-use system of straps and clips that are used to adjust the size of the pack. The top two pockets can be removed to make a perfectly sized sundries bag. I use this pack not only for the trail but for travel. It made m two week stint in Italy easy and mobile. If your looking into a pack for travel but you like to back pack. Get this pack, you won't be sorry.

      Functional, Streamlined, Breathable!

      • Familiarity: I've used it once or twice and have initial impressions

      The pack that I had before this was a bottom of the line 65 liter pack. It was my first time having a little bit of money for a nicer backpack, so I did my research. The 50L (without the head, that detaches!) was the perfect size to fit all of my gear for a 4 day, 3 night trip. I honestly could have fit quite a bit more gear/food if I was packing efficiently. The suspension system took a little bit of getting used to, but breathed well and helped make my load seem lighter once I had everything dialed in right.

      Functional, Streamlined, Breathable!

      Well thought out and breathable

      • Familiarity: I've put it through the wringer

      I've used this pack on trips ranging from day hikes to camping trips to mountain climbing and it never fails to perform. The suspension system on the back really helps with ventilation and weight distribution.

      Straight Awesome!

      • Familiarity: I've put it through the wringer

      Anti-gravity is simple amazing on this pack very comfortable! The Atmos has many adjustable straps so dial in your fit. The durability has stood up to anything that I put it through over some years. Also the 50L seems perfect for me I can always fit everything I need no problem even on longer trips. Highly recommend Osprey and The Atmos

      Great pack, but keep improving

      • Familiarity: I've used it once or twice and have initial impressions

      Let me just say I had a friend that I went on a backpacking trip through Italy with the Atmos 50 AG and absolutely loved it... So I purchased through her recommendation.

      My impressions are that is is FULL of great features...the Anti Gravity being the most awesome on the pack. It literally makes the weight of the pack feel less because of how it is distributed on your body. I did heavy research the Osprey lineup so I knew it would come with everything I needed on multi day trips.

      The adjustability of the hip belts and the torso were a plus for me since most packs do not fit me very well. My only complaint comes after getting caught in off and on rain storms on a trip in Colorado...not having an attached rain fly is no fun. They offer the attached fly for other packs but on this one. Wish they would just include, it makes keeping your gear dry in a pinch super easy compared to fumbling for the loose fly.

      Takeaway: Awesome, comfortable pack with loads of features that I think most people will be very happy with.

      Great pack!!!!

        I've used this backpack for a few backpacking trips, most recently on a backpacking trip to Havasupai. It worked perfectly! I have the burnt orange color and love it, and it doesn't show stains when you throw it in the dirt, which is inevitable. Osprey makes great products but this one takes the cake!

        I Need To Go Backpacking More

        • Familiarity: I've used it once or twice and have initial impressions

        It has been more than a few years since the last time I went backpacking. I have been once since I bought this pack and certainly plan to go a lot more in the coming months. I found this pack to be overall very comfortable, and the occasional discomfort that I did have can be safely attributed to me not reading enough about the proper adjustments. Overall a very great pack.

        Cadillac Backpack

        • Familiarity: I've used it several times

        Why have you been driving that old beater car with no a/c and a busted window? So you can buy the caddie of backpacks. This thing has it all and rides really nice on your back. I have used it on trips up to 6 days (50L atmos) and still have a little room to spare. If your going to eat ramen noodles so you can save up money to sit in a tent and eat ramen noodles you might as well splurge on a nice pack.

        Cadillac Backpack

        Osprey Packs Atmos AG 50

        • Familiarity: I've used it once or twice and have initial impressions

        Fits like a glove looks like it should hold up for a long time. Innovative back support/ventilation system is extra fancy.

        Very Comfortable

        • Familiarity: I've used it several times

        This is the most comfortable pack I have used. I don't backpack often so I don't go through bags often. My bags was going on 8 years old so I decided it was time upgrade and boy am I glad I did. The anti gravity system is awesome. I have never felt that level of comfort from a backpack. I like that the top lid is removable. I try and pack very light and as such don't need all the extra room.

        First backpack

        • Familiarity: I've used it once or twice and have initial impressions

        This fits great. Took it on a 2 hour hike into a lake for an over night camping trip. Had it fully loaded with sleeping bag, two person tent, extra clothes, 100oz camelback, and food. Very little pressure on my shoulders. I'm happy with my purchase and hope to get a lot of use out of it.

        Great pack!

        • Familiarity: I've used it once or twice and have initial impressions

        I've taken this pack on 2 trips so far and it has been great. My first trip included about 15 miles of hiking with 25 lbs in the pack and it was extremely comfortable the entire time.

        Great pack!!

        • Familiarity: I've used it several times

        Used this pack on a 5 day trek to Machu Picchu and it worked out perfect. Very comfortable. I went with the 50 AG over the 65 AG because the trips I go on are no more than 4-5 days. The only issue my wife had with hers was that she could barely fit her synthetic 15 degree mountain hardware sleeping bag into the sleeping bag compartment. That also took up a lot of the main compartments room. So if you have a bulky bag, beware.... Or just upgrade to a down that packs smaller and you'll be fine.

        Awesome pack!

          I love this pack. It's very comfortable and easy to manage. It has ample storage space and lots of places to strap items on the outside of the pack. I recently used it for a hike from the south rim of the Grand Canyon out to plateau point and back (12 miles) and I barely noticed I had the pack on which was loaded to about 20-30lbs at the time. The color is also cool. I would recommend this pack to anyone interested in the osprey brand.

          Awesome pack!

          This says the Atmos AG 50 has removable sleeping pad straps... Is this new? From what I understood the Atmos AG 65 had sleeping pad straps, but the Atmos AG 50 did not. Thanks in advance.

          Will the 50L hold a BV500 Bear vault?

          Hey David - The short answer is yes, you can fit a BV500 Bear vault container in the Atmos AG 50 (I have this pack and an old bearproof container). But it takes up a significant amount of space inside of the pack. Depending on the length of your trip in bear country, you might want to consider the Atmos AG 65. Feel free to contact me directly with any additional questions.

          - Kyle L. - Expert Gearhead

          This pack looks great, but I am desperate to get the non-AG version. I have the Atmos 65 from ~2013 and love it. I really want that older model in the 50L.

          If that is impossible, can anyone who used the older version and the AG comment comparing the two? Thanks!

          hey Mark, the older version holds the weight slightly further from your back, and the hipbelt wrap is not nearly as clean or as comfortable. The AG really wraps your body, and holds it in a tight hug. I love that you love your old Atmos, but I think you will be stoked for the AG.

          Thanks for the question -


          Osprey Rep

          Hey Mark, if you're still on the fence, some words from a recent convert -- I swapped out my 2008-era Atmos 50 for the Atmos 50 AG this summer.

          Leta from Osprey is right; this pack fits like nothing I've ever felt. Easily the most comfortable pack I've ever worn. It's not perfect for me though and I find myself missing my old pack a lot. Some things to consider:

          - Old Atmos 50 had two front zip pockets. The 50 AG does not (only the 65). I really miss the organization. AG has an extra pocket in the brain but I'd rather have the zips on the front.

          - Old Atmos had sleeping pad straps on the bottom. 50 AG does not (65 does).

          - Old Atmos had daisy chains on either side of the front stretch pocket. 50 AG does not, or any lash points at all really, unless you want to repurpose the tool loops on the bottom or the guides that hold the straps for the lid.

          - 50 AG is about a pound heavier than my '08 50. It FEELS a lot lighter because the suspension is amazing but still, the knees...

          - My '08 Atmos 50 worked as carry-on. It was amazing. The new AG frame is much taller (and skinnier, to keep weight closer to your body) and needs to be checked. Big bummer.

          - Along those lines, the frame is much more structured and the empty pack takes up a lot more room in my closet. When I see it in there it seems less like a bag and more like a suit of armor.

          BUT it's all worth it I think:

          - As said before, it carries like a dream. It feels so much lighter, the torso fit is really adjustable and the weight is closer to your back. I hike faster and my backpacking posture is much improved. This alone might have been worth the switch for me.

          - It has a bottom zip!! I still miss those extra front pockets but it's great to be able to access most of my gear without emptying everything out of the pack.

          - Bigger hipbelt pockets for snacks/camera/phone.

          - Removable lid if you're into that sort of thing. My problem with that is if you leave the brain at home you lose all organizational capability. But stuff sacks I guess...

          - Does your Atmos 65 squeak? My 50 did. No squeaks on the AG yet...

          - You know how the inside of your Atmos 65 is curved to create that space behind your back, so when you pack you've sort of got to move stuff around this banana shape inside your pack? A LOT less of that, thanks to the taller, skinnier frame.

          I hope this helps your decision one way or another. I know Osprey also makes a Stratos 50 that has the same sort of suspension the old Atmos did if you don't want to make the leap to AG. Have a great day!

          Thanks Ross. I recently went with the Osprey Kestral 48. I thought it was perfect, but after loading it for a trip last night, it was very uncomfortable. I just returned it to another store.

          My older Atmos 65 does squeak a bit, but not a big problem even for a complainer like me.

          I wish I would have seen your comments about 2 hours earlier!! I like the idea of it being narrow and taller - exactly what I'm looking for! But I just ordered what seemed to be THE LAST old version Atmos 50 on earth (from Japan of all places). I definitely overpaid, but I'm so used to my 65L, I'm sure I will be happy with it's little twin.

          But you helped me make up my mind if I need to get a replacement in the future.

          Can this work as carry-on and fit in the overhead cargo on plane?


          Depending on the airline you're flying with you'll have a different bag restrictions. Here are a few major air lines and their respective carry on size limitations compared to this pack:

          (All in inches)

          Delta Air Lines 22 x 14 x 9

          Southwest Airlines 24 x 16 x 10

          American Airlines 22 x 14 x 9

          This Pack: [medium] 31 x 14 x 16 in

          The length will be too big.

          Shoot me an email anytime you have questions!

          Jared D.

          Expert Gearhead


          Would anyone be able to confirm availability of size L in Cinnabar or perhaps Graphite Grey?

          I'm interested in a backpack in the 50-55L range to complement my Aether 60, which is great for colder weather camping. However, it's a bit too large for warmer weather camping. My tent, pad and bag for 40+_degree nights is approaching the lighter end: they only weigh 6 lbs combined. So I am interested in this pack - a size Large shows to be 53L, which is perfect.

          A 45L pack is a tad small for any food/water for a weekend of backpacking trip, but fine for an overnight trip or where I can readily access water sources on the hike with a filtration system.

          Thanks, Marc

          Best Answer

          Hey Marc!

          Just wanted to let you know that we will be receiving size Large of Cinnabar and Graphite Grey in the next few weeks. I'll do my best to let you know when we have one in stock.

          Give me a call and we can chat!



          Do you think this pack is large enough for a 4 day backpacking trip or should I go for the 65. I usually do 2-3 day trips

          Depends on how much you like to carry. If you are lightweight oriented and try to find ways to lighten the load the 50 will work. If you like to bring a lot of extra gear and be really comfortable bump up the pack size. For some this would be more than enough on 2-3 days others, no way.

          Feel free to hit me up at or 801-736-6398.

          Hey there, Leta, the Osprey rep chiming in - Right on, Bill. It really depends on your gear. The good thing about going bigger is that you don't HAVE to fill it, although the bad thing about going bigger is that you probably WOULD fill it! You will love the pack, though!

          Anyone have a suggestion on what size rain cover to get for this pack?

          Hey Daniel!

          It all depends on the brand of rain cover that you choose. A good item to look at would be the Mountainsmith Rain Covers.

          That cover in the size Small would be perfect for your pack, as it will fit a pack up to 3500 Cubic Inches.

          Feel free to contact me with any questions or to place an order. I would be happy to provide you with a personalized experience here at Backcounty!

          Ivan Mercado


          Hope to see you out there!

          Hey Daniel!

          Another great option for you that will likely fit even better than the Mountainsmith Rain Covers would be the Osprey Packs Ultralight Rain Cover , which are also a lighter weight!

          Depending on which size you go for with the Atmos, the rain cover you would want would be the Medium or Large size! Feel free to contact me with any further questions!

          Daniel Goodman

          Gearhead Operations

          where is this pack made from?