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Gregory Optic 48 vs Osprey Stratos 36

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

Osprey Stratos 36 is the lighter option — 60 g lighter than the Gregory Optic 48 (4% less weight). If grams matter to you, that is the one to beat.
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Spec Gregory Optic 48 Osprey Stratos 36
Weight 1,370 g · 1.370 kg · 3.02 lb 1,310 g · 1.310 kg · 2.89 lb
Brand Gregory Osprey
Category Backpack Backpack
Gregory Optic 48
1,370 g

Lightweight 48L trail pack with suspended mesh back panel.

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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Gregory Optic 48 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 60 g (4%) lighter than the Gregory Optic 48 (1,370 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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