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Osprey Packs Aether 55L Backpack

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Why We Like The Aether 55L Backpack

Osprey designed the new Aether Backpacks with a brand-new fitting system—Osprey's best—and the Aether 55 Backpack is perfectly sized for weekenders and overnighters. The back torso adjusts vertically to customize the fit for all sizes, and On-the-Fly shoulder strap and waist belt adjustments ensure quick-and-easy micro-adjustments that you can cinch on the trail. Osprey not only integrated a rain cover, but also treated the main fabric in DWR in case you don't get the cover on in time. A LightWire frame offers surprisingly stiff rigidity when you're carrying heavy loads, and Airscape mesh provides breathable ventilation on your back.

  • Solid-fitting backpack built for weekenders and overnighters
  • 55L is the smallest, standard Aether Backpack from Osprey
  • On-the-Fly shoulder and hip adjustments ensure a custom fit
  • LightWire frame with breathable Airscape back provides stability
  • DWR coating and included rain cover offer weather protection
  • Compression straps ensure a secure load
  • Zippered front panel gives you another way to access the main compartment
  • Pocketing and straps offer storage for sleeping bags, pads, ice axes, trekking poles, water bottles, and more
  • Item #OSPZ18S

Responsible Collection
Bluesign Approved
420HD nylon, DWR treatment
55L (3356cu in)
[frame] LightWire, [back panel] AirScape
Shoulder Straps
Waist Belt
Hydration Compatible
3L compatible
Reservoir Included
top, front
3 stretch mesh front, 2 zippered waist-belt, 2 stretch mesh side
Ice Axe Carry
Trekking Pole Carry
Sleeping Bag Compartment
removable straps, zippered devider compartment
Detachable Daypack
floating top lid
[upper] dual side straps, [lower] Inside-Out straps
Weight Capacity
37 - 60lb
33 x 15 x 12in
Claimed Weight
5lb 1.9oz
Manufacturer Warranty

Tech Specs

What do you think about this product?



Updated Osprey Fan Favorite

The Aether has been a flagship pack in the Osprey line for years and has now been updated. This latest version will have an easy to adjust fit-on-the-fly harness and hipbelt, injection molded back panel providing additional support, and now includes an integrated rain cover. This is the ideal overnight pack and is also constructed with bluesign approved fabrics! -Dan, Osprey Rep