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Osprey Aether AG 85 Internal Frame Backpack

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Osprey Aether AG 85 Internal Frame Backpack

By Luke

Enwild Gear Specialist

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Combining its hard-earned reputation as a rugged load-hauling option for extended backpacking trips with the revolutionary Anti-Gravity suspension the Osprey Aether AG 85 offers a dynamic responsive fit 5000+ cubic inches of storage capacity and a weight-carrying capacity of up to 60 pounds!


Combining its hard-earned reputation as a rugged load-hauling option for extended backpacking trips with the revolutionary Anti-Gravity suspension the Osprey Aether AG 85 offers a dynamic responsive fit 5000+ cubic inches of storage capacity and a weight-carrying capacity of up to 60 pounds!

Osprey's innovative Anti-Gravity suspension system equips the pack with weight-carrying efficiency breathability and a contoured fit. A broad-mesh tensioned backpanel stretches all the way out across the lumbar portion of the pack. Though the pack maintains constant responsive contact with the wearer warm air can escape freely because of the separation caused between the mesh and the pack itself. Beneath the mesh a peripheral LightWire aluminum frame. A sliding sternum strap and adjustable load-lifter straps further enhance fit.

Accommodating backpackers of different heights the pack is available in your choice of sizes. The Small size fits torsos ranging from 16”-19” the Medium fits from 18”-21” and the Large accommodates torso lengths ranging from 20”-23”. An Anti-Gravity IsoForm harness and a fully-padded moldable IsoForm hipbelt maximize performance fit and comfort. T

The pack’s large main compartment is reached through a traditional top-loading access point but a large J-shaped zipper on the front of the pack also allows quick access to the interior. Additionally a lower compartment serves as a dedicated spot for stowing your sleeping bag or other clothes and gear. A removable divider enables you to open up the interior to create a single spacious compartment. A large front pocket utilizes welded stretch woven fabric to serve as a convenient storage spot for discarded layers or other gear. Elastic side pockets are ideal for stashing water bottles or other smaller items. Integrated hipbelt pockets provide a spot to keep essentials close at hand. Side compression straps enable you to cinch down your pack to keep contents safely and securely in place and also double as lash points for additional gear. Buckled straps that pass over the front of the packbag are designed to further enhance the compressibility of the pack and provide yet another place to lash gear. A removable top lid protects the contents of the pack and can be removed entirely to save weight . Adding increased versatility the lid also serves as a streamlined stand-alone daypack with its own minimalist shoulder straps an adjustable sternum strap and an internal hydration sleeve.

Other features include integrated Stow-on-the-Go trekking pole loops ice axe loops with bungee tie-offs removable sleeping pad straps and an internal sleeve that makes the pack hydration compatible (hydration system sold separately).

The Osprey Aether AG 85 internal frame backpack is available in your choice of size and color options.

  • Removable top-lid converts to DayLid daypack
  • Dual upper side compression straps
  • Dual access side stretch mesh pockets
  • Lower Inside-Out compression straps
  • Zippered hipbelt pockets
  • Stow-on-the-Go trekking pole attachment
  • Additional main compartment access
  • Large stretch mesh front panel pocket
  • Dual front compression straps with StraightJacket compression
  • Dual ice tool loops with bungee tie-offs
  • Zippered sleeping bag compartment with removable divider
  • Removable sleeping pad straps
  • Integrated FlapJacket cover for lidless use
  • Internal hydration reservoir sleeve
  • Large front J-zip access to main compartment
California residents: view proposition 65  Warning

Technical Specs

Best Use
Top Loading w/ Side Access and Sleeping Bag Compartment
Detachable Daypack
Item Dimensions
34" x 17" x 15"
Fits Torso
Small: 16"-19"
Medium: 18"-21"
Large: 20"-23"
Frame Material
Hydration Compatible
Maximum Weight
60 lbs
Sternum Strap
Yes; Adjustable
Torso Adjustment
Small: 5004 cu in
Medium: 5187 cu in
Large: 5370 cu in
Limited Lifetime
Internal Frame Backpack
Main: 210D Nylon Dobby
Accent: 210D High Tenacity Nylon Shadow Box
Bottom: 500D Nylon Packcloth
Item Weight
Small: 5.32 lbs
Medium: 5.37 lbs
Large: 5.42 lbs

16 Reviews

4.75 / 5


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Jeffrey C.


Well built and very comfortable


Plenty of room and the detachable lid/day pack is a very welcome plus. Fits nice and distributes the weight well so the pack doesn’t feel heavy at all. I’m very happy with my purchase. Well worth the money.


I haven’t found anything that I dislike yet.

John R.


comfort and versatility


I like the detachable top lid, and the ability to attach a daylite pack for extra capacity. I will be using this pack for Aconcagua, with the daylite attached, then dropping the daylite for multi-day trips through out Argentina.





Great Pack!


Love the AG suspension, shoulder straps, and hip belt. Excellent space and handles large loads well. Extremely comfortable.





Nice, but not for me


Hip belt comfort is unreal and the pack is well-made with great features. Seemed like it was well ventilated for an internal frame pack.


I wish the width of the shoulder strap placement was adjustable. In the end, I prefer the way an external frame pack adjusts and carries. Just wish I could put this hip belt on my external frame pack!



Love this pack


Material Color External Straps Water Bottle Holders Quality Zippers


Waistbelt comfort. The only negative about the pack I found was the comfort of the hip belt. I opted for the Osprey Xenith instead with the Bioform hipbelt and find it much more comfortable. Although now knowing that I can swap the hipbelt of the Ather out for the bioform, I may do that as well.

Jason F.


Bigger is better


I bought this over the Aether 70 because its weight is so close to the same and the added space is very nice to have. You cant make the pack bigger but you can make it smaller with compression straps.


I wish it was a little taller and less wide.

Michael M.




So many features! Love the J zip.


NONE REALLY. Sometimes I have a hard time zipping hip belt pocket with one hand.

Reuben B.


Everything i wanted and more!


Just feels like a quality product. You can tell when you strap this thing on your back that you got your moneys worth. I cant see it ever failing in any way but if it does, the warranty is worth buying an Osprey.


If i had to pick something, I would say that it isn't waterproof. It's a bit heavy too, but that is expected at 85L.

Donald D.


Purchase for trip to Alaska


Plenty of room,very light, color.


The main opening latch is not convenient to open to me at least.

Laurent F.


Light Comfortable and Big


Love the design, the size, the comfort on the shoulders and especially the daypack that is a real backpack.


Nothing yet :)

Anthony D.


Just what I was looking for!


Extremely well built and the suspension system is pure heaven when the pack is loaded up. I'm actually having trouble loading it all the way up, gear disappears into it and there always seems more room to put something else in there. I'm 5'9", 190# with a 30" waist - the Medium fits perfectly and the hip belts from the get go are just right. I love the bottom sleeping bag compartment, and the hydration system (separate purchase) works very well. It's a good looking, streamlined pack that will comfortably carry more than I should actually put into it.


It should have included a pack cover, but not a deal breaker...



Love this Pack


Finally upgraded my 20 year old LoweAlpine pack. HOLY COW this pack is amazing. I hardly know what to do with the space and my back doesn't ache the entire week!