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Osprey PacksAether 55L Backpack

Osprey PacksAether 55L Backpack

Select a color:Deep Water Blue

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Size Chart


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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

Tech Specs

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

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