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Osprey Exos 48 vs Osprey Sirrus 36

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

Osprey Sirrus 36 is the lighter option — 60 g lighter than the Osprey Exos 48 (5% less weight). If grams matter to you, that is the one to beat.
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Spec Osprey Exos 48 Osprey Sirrus 36
Weight 1,280 g · 1.280 kg · 2.82 lb 1,220 g · 1.220 kg · 2.69 lb
Brand Osprey Osprey
Category Backpack Backpack
Osprey Exos 48
1,280 g

Lightweight 48L thru-hiking pack with excellent ventilation.

See it in your base weight → Full details →
Osprey Sirrus 36
1,220 g

Women's ventilated 36L pack with AirSpeed back panel.

See it in your base weight → Full details →

Building a pack? Add either one to your HikeLoad list, or drop its weight into the base weight calculator, and see what it does to your total weight.

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Osprey Exos 48 vs Osprey Sirrus 36: which should you buy?

If saving weight is your priority, the Osprey Sirrus 36 wins — at 1,220 g it is 60 g (5%) lighter than the Osprey Exos 48 (1,280 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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