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    Garlic Mustard
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    Raincover Included
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    Supportive Hip Belt
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    Front Panel Zip

Osprey Aether 55L Backpack

  • Product Number: 4391

You come to the trailhead fully prepared, you expect the same reliability and readiness from your pack—and the Aether 55 delivers. Custom Fit-on-the-Fly™ Shoulder Straps, Hipbelt and an adjustable torso provide a near-perfect fit while an injection-molded backpanel offers close-to-body performance. Made with bluesign-approved nylon and PFC-free DWR. Raincover included.


  • Included raincover made with PFC-free DWR and bluesign®-approved materials
  • Large front panel zip access to main compartment
  • Floating top lid with lash points
  • Fabric reinforced front shove-it pocket
  • Large dual-access stretch mesh side water bottle pockets
  • Dual upper/lower side compression straps
  • Dual front panel compression straps with StraightJacket compression
  • Dual zippered hipbelt pockets
  • Dual ice axe loops with bungee tie-offs
  • Zippered sleeping bag compartment with removable divider
  • Removable sleeping pad strap
  • Internal hydration reservoir sleeve
  • Anchor loops for an optional Osprey Daylite daypack for short forays

Specifications & Sizes:

  • Main Fabric: bluesign®-approved 420HD nylon packcloth, PFC-free DWR
  • Accent Fabric: bluesign®-approved 210D nylon Diamond, PFC-free DWR
  • Bottom Fabric: bluesign®-approved 420HD nylon packcloth, PFC-free DWR

Small - Medium

  • Weight: 4.827 lbs
  • Dimensions: 30.71 X 14.96 X 9.84 in
  • Volume: 3356 IN3 / 55 L

Large - XLarge

  • Weight: 4.871 lbs
  • Dimensions: 32.68 X 14.96 X 9.84
  • Volume: 3539 IN3 / 58 L