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Osprey Atmos AG 50 vs Osprey Stratos 36

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

Osprey Stratos 36 is the lighter option — 590 g lighter than the Osprey Atmos AG 50 (31% less weight). If grams matter to you, that is the one to beat.
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Spec Osprey Atmos AG 50 Osprey Stratos 36
Weight 1,900 g · 1.900 kg · 4.19 lb 1,310 g · 1.310 kg · 2.89 lb
Brand Osprey Osprey
Category Backpack Backpack
Osprey Atmos AG 50
1,900 g

Versatile 50L Anti-Gravity pack for multi-day adventures.

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Osprey Stratos 36
1,310 g

Ventilated 36L day and overnight pack with AirSpeed suspension.

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Osprey Atmos AG 50 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 590 g (31%) lighter than the Osprey Atmos AG 50 (1,900 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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