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Osprey Stratos 36 vs Patagonia Ascensionist 35L

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

Patagonia Ascensionist 35L is the lighter option — 572 g lighter than the Osprey Stratos 36 (44% less weight). If grams matter to you, that is the one to beat.
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Spec Osprey Stratos 36 Patagonia Ascensionist 35L
Weight 1,310 g · 1.310 kg · 2.89 lb 738 g · 0.738 kg · 1.63 lb
Brand Osprey Patagonia
Category Backpack Backpack
Osprey Stratos 36
1,310 g

Ventilated 36L day and overnight pack with AirSpeed suspension.

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Patagonia Ascensionist 35L
738 g

Lightweight climbing and hiking 35L pack.

Full details →

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Osprey Stratos 36 vs Patagonia Ascensionist 35L: which should you buy?

If saving weight is your priority, the Patagonia Ascensionist 35L wins — at 738 g it is 572 g (44%) lighter than the Osprey Stratos 36 (1,310 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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