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  • Lightweight suspended-mesh panel extends from the upper torso through the lumbar area to wrap your back in breathable comfort
  • Heat-moldable hipbelt and harness provide outstanding fit and comfort for heavy loads and long miles; they are interchangeable to provide a custom fit
  • Use the removable top lid as a functional daypack, or leave it at home to reduce weight
  • Large J-zip access to the main compartment on the front panel makes loading and unloading easy
  • Dual upper side compression straps; lower inside-out compression straps; dual front compression straps
  • Dual-access stretch-mesh side pockets; zippered hipbelt pockets; large stretch-mesh pocket on the front panel
  • Stow-on-the-Go trekking pole attachment; dual ice-tool loops with bungee tie-offs; removable sleeping pad straps
  • Zippered sleeping bag compartment with removable divider
  • Internal hydration sleeve (hydration reservoir sold separately)


View all Osprey Backpacking Packs

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Best Use Backpacking
Frame Type Internal Frame
Gear Capacity (L)
Gear Capacity (cu. in.)
5 lbs. 5.1 oz.
5 lbs. 5.9 oz.
5 lbs. 6.7 oz.
Adjustable Torso Yes
Fits Torso
16 - 19 inches
18 - 21 inches
20 - 23 inches
Fits Waist/Hips
29 - 31 inches
30 - 34 inches
33 - 37 inches
Material(s) Nylon
Frame Material 3.5mm LightWire peripheral frame
Number of Stays 1
Hydration Compatible Yes
Suspended Mesh Back Panel Yes
Pack Access Top, bottom, panel
Number of Exterior Pockets 7
Sleeping Bag Compartment Yes
Removable Daypack Yes
Dimensions 34 x 17 x 15 inches
Gender Men's
Rated 5 out of 5 by from Excellent pack - almost perfect + Very comfortable, even though I had the honours of carrying the tent and all rubbish so I was on 27kg if you include the 3 litres of water I would typically carry. + Very large rain cover - big enough to go over anything extra on the outside of the pack too. The cover is stored in the lid. + Great build quality. We had to lower the bags twice and all scrapes and bashings have not shown up. The buckle never popped on the waist band either. + The lid has a HUGE storage area (under the rain cover) and I was very impressed. Also, with two clips and rethreading one piece of tape one can remove it entirely. There is then a strap which converts it into a "moon bag" of sorts. I removed mine each night and kept it as a "grab bag" in case we had to run away in the night as we had security issues. + Mesh external pocket on the outside of the bag is handy for storing jackets and whatever else. + The j-zip is handy for gaining access into the bag too. + A pocket per side on the hip belt is big enough for a cell phone, pepper spray, compass, that sort of stuff. Decent size. + Light weight. - The side pockets are a joke. You can barely squeeze anything into them. They should have allowed more material there. And I'm not sure why they have that dual hole system. I'd rather have had a deep single pocket either side. Would work for small water bottles, very small ones... I used them to shove in gaiters when not in use. Possibly the only feature I'm not impressed with. - There is an external hydration pocket between your back and the bag. Looks impressive and neat and clever. However once loaded I think you could maybe fit a litre in there. I could be wrong. I certainly had zero chance of getting the three litre in. One could say put in the bladder then load the bag, however filling up then becomes a pain. I will get a one litre and try it in the future, so perhaps it's an awesome feature and it's just me. Rate it 5 stars though!
Date published: 2016-06-08
Rated 5 out of 5 by from Very comfortable bag Great for backpacking
Date published: 2016-05-02
Rated 5 out of 5 by from Very good pack I am taking a 10 day hike and needed a larger bag. I was able to easily pack everything and did a small walk about to determine its fit. It fit the bear container sideways. The zipper on the side for the main compartment is very useful. I measured my torso and selected the large. I do not see any torso adjustments so you best get that right. I also bought the water bladder, filled it up for my test walk and did not feel any pressure on the back.
Date published: 2017-06-11
Rated 5 out of 5 by from Nothing but the best Use this pack frequently for wilderness bow hunting trips of 4-10 days in colorado and montana. Carry about 50lbs in, and 90-130lbs out for 4-9miles. Never fails. Thrown a few threads but great condition over the last 5 years of use.
Date published: 2016-10-01
Rated 5 out of 5 by from Great fitting pack I bought this before a section hike of the Appalachian Trail (Winding Stair Gap to Fontana Dam. After being shown the size I needed and how to adjust it felt great (except that I tried to carry to much weight). The pack handled everything fine but this 66 year old man shouldn't carry a 50 pound pack. Great product and service from REI.
Date published: 2017-06-05
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What is the volume and weight of the pack without the top lid?

Asked by: skiboy
Without the top lid, the volume of this pack is approximately 68 liters. The weight of the pack without the top lid is approximately 4 pounds 11 ounces.
Answered by: REIservice
Date published: 2017-06-22

I see that the daypack has a hydration sleeve, would a 3 liter osprey hydration reservoir fit in both the pack and the day pack? Not sure how much room there is for the reservoir in the daypack.

Asked by: Clev
A 3 liter hydration reservoir will fit in both the removable daypack and the main pack.
Answered by: REIservice
Date published: 2017-06-05

Comparing the weight, I noticed that the Aether 85 was one ounce lighter than the 70. Is this correct or a typo?

Asked by: Honeybadger
The weight listed for the Aether 70 AG was incorrect. Thank you for calling this to our attention, we will have our website updated shortly.
Answered by: REIservice
Date published: 2017-06-16

The Osprey Aether AG 85 on Osprey web site converts the top to a day pack. Your description above says that the (same?) pack converts to a lumbar pack. It seems the previous years model offered the lumbar pack. Is this model above 2017 model?

Asked by: Alois
The top lid of this pack converts into a small daypack. This is the 2017 model.
Answered by: REIservice
Date published: 2017-05-14

can someone tell me the main difference between the older models and the 2017? I'm wondering if its worth the extra $100.

Asked by: soopy
​The biggest difference between the new Aether pack and the older models is the new Anti-Gravity (AG) fit system from Osprey. This allows you to better customize the overall fit of the pack giving you a more comfortable carry.
Answered by: REIservice
Date published: 2017-06-08

Is the sleeping bag compartment large enough to fit a -20 and does the inside zip shut to form a completely separate compartment (i.e. small things from the main compartment can't fall into the sleeping bag section)?

Asked by: Lila
Without knowing the compressed size of your sleeping bag, we are unable to confirm if it is going to fit. However, many -20 sleeping bags are too large for the sleeping bag compartment on this pack. It is not a completely separate compartment from the main compartment as the divider is removable and not fully sewn into the pack around the edges.
Answered by: REIservice
Date published: 2017-06-20

Does this pack come with a rain cover?

Asked by: mooresy19
This pack does not come with a rain cover. The XL Osprey UltraLight Pack Raincover is a good choice.
Answered by: REIservice
Date published: 2017-06-22

2) Will this fit a bear resistant container? I have the Garcia bear resistant container

Asked by: Tender Foot
​Yes, a bear resistant canister will fit in the Aether 85 pack.
Answered by: REIservice
Date published: 2017-06-01
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