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Osprey Packs
Atmos AG 65L Backpack

3.5 out of 5 stars
2 Reviews


Size Chart


Why We Like The Atmos AG 65L Backpack

It's simple: the comfier the backpack, the comfier the hike, and the comfiest backpack is the one that fits best. The Atmos AG 65 Backpack is Osprey's best-fitting, most ventilated, and comfiest option for multi-day treks. Multiple adjustments running vertically and horizontally place the padded shoulder straps and suspended mesh back panel right where we want them, and the padded Fit-on-the-Fly waist belt lets us buckle, cinch, and go without hassling with a bunch of micro-adjustments.


  • Osprey's best-fitting backpack for multi-day treks
  • 65L capacity suitable for multi-day or weeklong adventures
  • Anti-Gravity suspension is well-ventilated and cushioned
  • Shoulders adjust up and down back panel for a custom fit
  • Fit-On-The-Fly waist belt ensures a quick-and-easy fit
  • Internal sleeve accommodates 3L hydration reservoirs
  • Bottom sleeping bag compartment and removable sleeping pad straps
  • Item #OSPZ1CD
Responsible Collection
Bluesign Approved, Recycled/Repurposed
[main, accent] recycled 210D honey comb nylon, PFC/PFAS-free DWR, [bottom] recycled 500D high tenacity nylon, PFC/PFAS-free DWR
[small/medium] 65L (3967cu in), [large/x-large] 68L (4150cu in)
Anti-Gravity suspended mesh, full peripheral frame, ExoForm wrap upper
Shoulder Straps
Anti-Gravity mesh
Waist Belt
Hydration Compatible
internal sleeve (3L capacity)
Reservoir Included
2 side, 1 zippered top, 2 zippered waist belt, 1 front mesh
Ice Axe Carry
dual, upper compression straps
Trekking Pole Carry
Sleeping Bag Compartment
bottom, removable divider
Rain Cover
upper and lower side straps
[small/medium] 32.68 x 15.35 x 14.17in, [large/x-large] 34.65 x 15.35 x 14.17in
Claimed Weight
[small/medium] 4lb 10oz, [large/x-large] 4lb 13oz
Manufacturer Warranty

Overall Rating

3.5 based on 2 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 1 reviews
3 Stars - 0 reviews
4 Stars - 0 reviews
5 Stars - 1 reviews

Fits Slightly Small

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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2 out of 5 stars

April 29, 2024

Mixed feelings…

I've used it once or twice and have initial impressions
Size Bought:
5' 11"

I used it for the first time on a 3 days back packing down into the Grand Canyon. Great in terms of organization and weight. Not so great on height location on my back, would have preferred it to sit a bit higher (I am 5”11’ and used the large back pack after measuring both sizes. Most problematic and disappointing - seams on the internal side of the waste band were cutting into my skin…

Ziv B
5 out of 5 stars

August 1, 2022

Awesome pack

I've used it once or twice and have initial impressions
Size Bought:
6' 3"

I just got back from a three-day, 18-mile backpacking trip. This pack worked flawless. It was easy to pack/unpack and easy to carry with the on-the-fly adjustments. It held up without any issues, including during several storms and miles of bushwhacking. The side compression straps worked great at keeping my fly rod secure. The sleeping pad straps are a bit thin but still managed to keep my tent on the pack. Osprey's products are some of the best around.