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Osprey Aether 65 vs Osprey Stratos 36

Weight and specs compared for 2026 — and which one to choose.

Osprey Stratos 36 is the lighter option — 900 g lighter than the Osprey Aether 65 (41% less weight). If grams matter to you, that is the one to beat.
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Spec Osprey Aether 65 Osprey Stratos 36
Weight 2,210 g · 2.210 kg · 4.87 lb 1,310 g · 1.310 kg · 2.89 lb
Brand Osprey Osprey
Category Backpack Backpack
Osprey Aether 65
2,210 g

Heavy-load backpacking pack with Fit-on-the-Fly adjustable harness and hipbelt and an AirScape backpanel for extended trips.

See it in your base weight → Full details →
Osprey Stratos 36
1,310 g

Ventilated 36L day and overnight pack with AirSpeed suspension.

See it in your base weight → Full details →

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Osprey Aether 65 vs Osprey Stratos 36: which should you buy?

If saving weight is your priority, the Osprey Stratos 36 wins — at 1,310 g it is 900 g (41%) lighter than the Osprey Aether 65 (2,210 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.

See where both rank against everything else in this category on the lightest backpack page, or browse the full gear weight database.

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