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  • Providing superior load support, this IsoForm harness is a 3D dual-density foam that's contoured and anatomic
  • Includes built-in Stow-on-the-Go trekking pole attachment bungees
  • IsoForm5 Harness is compatible with any of the Osprey Aether AG or Aether AG EX packs (sold separately)


View all Osprey Backpack Shoulder Straps

REI membership


Best Use Backpacking
Fits Torso
16 - 18.5 inches
18 - 20.5 inches
20 - 22.5 inches
> 22 inches
Material(s) Dual-density foam/nylon
Weight Unavailable
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can i put a M harness on a L pack? Will that remedy a L pack that is too large? What models does this fit...I need Aether.

Asked by: SpiritTrek
​A medium harness can be used on a large pack. Keep in mind that IsoForm5 straps and hipbelt are only compatible with the new Aether and Ariel AG packs. The IsoForm4 straps and hipbelts are compatible with the older Aether and Ariel models.
Answered by: REIservice
Date published: 2017-05-06

Will putting a M strap on a L backpack help with a pack that is too big.  

Asked by: Mico2112
  • y_2017, m_5, d_25, h_11CST
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